CsharpToColouredHTML.Core 1.0.41

.NET 7.0 This package targets .NET 7.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package CsharpToColouredHTML.Core --version 1.0.41                

                    
                

            
NuGet\Install-Package CsharpToColouredHTML.Core -Version 1.0.41
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="CsharpToColouredHTML.Core" Version="1.0.41" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add CsharpToColouredHTML.Core --version 1.0.41                

                    
                

            
#r "nuget: CsharpToColouredHTML.Core, 1.0.41"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install CsharpToColouredHTML.Core as a Cake Addin
#addin nuget:?package=CsharpToColouredHTML.Core&version=1.0.41

// Install CsharpToColouredHTML.Core as a Cake Tool
#tool nuget:?package=CsharpToColouredHTML.Core&version=1.0.41

Demo

You can try live demo that's avaliable at: https://csharp-colors.xyz/ or directly from Nuget linked below

CsharpToColouredHTML

This library tries to convert C# code into pure HTML with some lines of CSS that make it look as if that was inside Visual Studio or Visual Studio Code.

If this tool colours something in an undesired way e.g something should be coloured as a struct instead of a class, but there was no way to figure it out from the code, then it is very easy to change that by changing CSS class name.

Microsoft Docs default code highlighting (left) vs. this project (right)

img

Highlighting whole lines or just some elements

obraz

Why?

Motivation for doing it was that I wanted to put C# code fragments on website,

but I didn't like the colours that were provided by popular syntax highlighting solutions - they were not so IDE-ish,

but also I wanted to have server-side rendering, so users aren't required to have JavaScript enabled* in order to see colors.

* Ironically demo page uses a few lines of js just to make messing with the demo more sane

Security Considerations

Even despite performing escaping

I still recommend to use it only on trusted inputs, at least for now.

Usage

You can try live demo that's avaliable at: https://csharp-colors.xyz/

Or use it in your projects directly: https://www.nuget.org/packages/CsharpToColouredHTML.Core/

.NET CLI: dotnet add package CsharpToColouredHTML.Core --version 1.0.41

Sample Usage:

var html = new CsharpColourer().ProcessSourceCode(code, new HTMLEmitter());
Console.WriteLine(html);

⚠️ If you want to have pure HTML without Iframe and HTML being escaped, then use DisableIframe() ⚠️

var settings = new HTMLEmitterSettings().DisableIframe();
var html = new CsharpColourer().ProcessSourceCode(code, new HTMLEmitter(settings));
Console.WriteLine(html);

Custom CSS

var myCustomCSS = "<style>...</style>";
var settings = new HTMLEmitterSettings().UseCustomCSS(myCustomCSS);
var html = new CsharpColourer().ProcessSourceCode(code, new HTMLEmitter(settings));
Console.WriteLine(html);

Highlighting Lines - Approach 1

var settings = new HTMLEmitterSettings().HighlightThoseLines(x => x == 5);
var html = new CsharpColourer().ProcessSourceCode(code, new HTMLEmitter(settings));
Console.WriteLine(html);

Post-processing / Highlighting Lines - Approach 2

var colourerSettings = new CsharpColourerSettings
{
    PostProcessingAction = (list) =>
    {
	foreach (var item in list)
	    if (item.Text.Contains("localhost"))
		item.UseHighlighting = true;
    }
};

var html = new CsharpColourer(colourerSettings).ProcessSourceCode(code, new HTMLEmitter());	
Console.WriteLine(html);

Post-processing - Overriding Colours

Action<List<NodeAfterProcessing>> myUnityPostprocessor = (List<NodeAfterProcessing> nodes) =>
{
    var list = new List<string>
    {
	"OnBecameInvisible"
    };

    foreach (var node in nodes)
    {
	if (list.Contains(node.Text))
	{
	    node.Colour = NodeColors.Keyword;
	}
	else
	{
	    node.Colour = NodeColors.Control;
	}
    }
};

var colourerSettings = new CsharpColourerSettings
{
    PostProcessingAction = myUnityPostprocessor
};

var html = new CsharpColourer(colourerSettings).ProcessSourceCode(code, new HTMLEmitter());

Disabling Line Numbers

var settings = new HTMLEmitterSettings().DisableLineNumbers();
var html = new CsharpColourer().ProcessSourceCode(code, new HTMLEmitter(settings));
Console.WriteLine(html);

Advanced Scenarios

Manually affecting heuristics:

CsharpColourer exposes "Hints" property which contains various lists that are used when trying to figure out colour for structs/classes/types

var colourer = new CsharpColourer();
colourer.Hints.ReallyPopularStructsSubstrings.Add("SuperStruct");
colourer.Hints.ReallyPopularClasses.Add("DomainEvent");
colourer.Hints.BuiltInTypes.Add("int512");
var html = colourer.ProcessSourceCode(code, emitter);

Creating your own emitter:

public class MyEmitter : IEmitter
{
	public string Emit(List<NodeAfterProcessing> nodes)
	{
		var sb = new StringBuilder();

		foreach (var node in nodes)
			sb.Append($"{node.TextWithTrivia} of colour {node.Colour}");

		return sb.ToString();
	}
}

var txt = new CsharpColourer().ProcessSourceCode(code, new MyEmitter());
Console.WriteLine(txt);

CSS Customizability

Change Log

Examples

Example input:

using System.Text;
using Microsoft.CodeAnalysis.Classification;

namespace CsharpToColouredHTML.Core;

public class ConsoleEmitter : IEmitter
{
    public ConsoleEmitter(bool addDiagnosticInfo = false)
    {
        this.addDiagnosticInfo = addDiagnosticInfo;
    }

    private readonly StringBuilder _sb = new StringBuilder();

    private readonly bool addDiagnosticInfo;

    public string Text { get; private set; }

    public void Emit(List<Node> nodes)
    {
        Console.ResetColor();

        Text = "";
        _sb.Clear();

        foreach (var node in nodes)
        {
            EmitNode(node);
        }

        Text = _sb.ToString();
    }

    public void EmitNode(Node node)
    {
        if (node.ClassificationType == ClassificationTypeNames.ClassName)
        {
            Console.ForegroundColor = ConsoleColor.Red;
        }
        else if (node.ClassificationType == ClassificationTypeNames.NamespaceName)
        {
            Console.ForegroundColor = ConsoleColor.Green;
        }
        else if (node.ClassificationType == ClassificationTypeNames.Identifier)
        {
            Console.ForegroundColor = ConsoleColor.Green;
        }
        else if (node.ClassificationType == ClassificationTypeNames.Keyword)
        {
            Console.ForegroundColor = ConsoleColor.Yellow;
        }
        else if (node.ClassificationType == ClassificationTypeNames.StringLiteral)
        {
            Console.ForegroundColor = ConsoleColor.Cyan;
        }
        else if (node.ClassificationType == ClassificationTypeNames.LocalName)
        {
            Console.ForegroundColor = ConsoleColor.Blue;
        }
        else if (node.ClassificationType == ClassificationTypeNames.MethodName)
        {
            Console.ForegroundColor = ConsoleColor.Red;
        }
        else if (node.ClassificationType == ClassificationTypeNames.Punctuation)
        {
            Console.ForegroundColor = ConsoleColor.White;
        }
        else if (node.ClassificationType == ClassificationTypeNames.Operator)
        {
            Console.ForegroundColor = ConsoleColor.White;
        }
        else if (node.ClassificationType == ClassificationTypeNames.ControlKeyword)
        {
            Console.ForegroundColor = ConsoleColor.DarkRed;
        }
        else if (node.ClassificationType == ClassificationTypeNames.VerbatimStringLiteral)
        {
            Console.ForegroundColor = ConsoleColor.DarkRed;
        }
        else if (node.ClassificationType == ClassificationTypeNames.StringLiteral)
        {
            Console.ForegroundColor = ConsoleColor.DarkGreen;
        }
        else if (node.ClassificationType == ClassificationTypeNames.ParameterName)
        {
            Console.ForegroundColor = ConsoleColor.Yellow;
        }
        else
        {
            Console.ResetColor();
        }

        _sb.Append(node.TextWithTrivia);
        Console.Write($"{node.TextWithTrivia}");

        if (addDiagnosticInfo)
        {
            _sb.Append($"({node.ClassificationType})");
            Console.Write($"({node.ClassificationType})");
        }

        Console.ResetColor();
    }
}

<a name="ex1">How generated HTML looks in browser:</a>

obraz

Generated HTML Code:

<style>.background{font-family:monaco,Consolas,LucidaConsole,monospace;background-color:#1E1E1E;overflow:scroll;}.method{color:#DCDCAA;}.class{color:#4EC9B0;}.keyword{color:#569cd6;}.string{color:#ce9178;}.interface{color:#b8d7a3;}.control{color:#C586C0;}.namespace{color:#dfdfdf;}.identifier{color:#dfdfdf;}.punctuation{color:#dfdfdf;}.operator{color:#dfdfdf;}.propertyName{color:#dfdfdf;}.fieldName{color:#dfdfdf;}.localName{color:#9CDCFE;}.parameter{color:#9CDCFE;}table{white-space:pre;}.line_no::before{content:attr(line_no);color:white;}.code_column{padding-left:5px;color:#dfdfdf;}</style>
<pre class="background">
<table>
<tbody>
<tr><td class="line_no" line_no="0"></td><td class="code_column"><span class="keyword">using</span> System.Text;</td></tr><tr><td class="line_no" line_no="1"></td><td class="code_column"><span class="keyword">using</span> Microsoft.CodeAnalysis.Classification;</td></tr><tr><td class="line_no" line_no="2"></td><td></tr><tr><td class="line_no" line_no="3"></td><td class="code_column"><span class="keyword">namespace</span> CsharpToColouredHTML.Core;</td></tr><tr><td class="line_no" line_no="4"></td><td></tr><tr><td class="line_no" line_no="5"></td><td class="code_column"><span class="keyword">public class</span> <span class="class">ConsoleEmitter</span> : <span class="interface">IEmitter</span></td></tr><tr><td class="line_no" line_no="6"></td><td class="code_column">{</td></tr><tr><td class="line_no" line_no="7"></td><td class="code_column">    <span class="keyword">public</span> <span class="class">ConsoleEmitter</span>(<span class="keyword">bool</span> <span class="parameter">addDiagnosticInfo</span> = <span class="keyword">false</span>)</td></tr><tr><td class="line_no" line_no="8"></td><td class="code_column">    {</td></tr><tr><td class="line_no" line_no="9"></td><td class="code_column">        <span class="keyword">this</span>.addDiagnosticInfo = <span class="parameter">addDiagnosticInfo</span>;</td></tr><tr><td class="line_no" line_no="10"></td><td class="code_column">    }</td></tr><tr><td class="line_no" line_no="11"></td><td></tr><tr><td class="line_no" line_no="12"></td><td class="code_column">    <span class="keyword">private readonly</span> <span class="class">StringBuilder</span> _sb = <span class="keyword">new</span> <span class="class">StringBuilder</span>();</td></tr><tr><td class="line_no" line_no="13"></td><td></tr><tr><td class="line_no" line_no="14"></td><td class="code_column">    <span class="keyword">private readonly bool</span> addDiagnosticInfo;</td></tr><tr><td class="line_no" line_no="15"></td><td></tr><tr><td class="line_no" line_no="16"></td><td class="code_column">    <span class="keyword">public string</span> Text { <span class="keyword">get</span>; <span class="keyword">private set</span>; }</td></tr><tr><td class="line_no" line_no="17"></td><td></tr><tr><td class="line_no" line_no="18"></td><td class="code_column">    <span class="keyword">public void</span> <span class="method">Emit</span>(<span class="class">List</span>&lt;<span class="class">Node</span>&gt; <span class="parameter">nodes</span>)</td></tr><tr><td class="line_no" line_no="19"></td><td class="code_column">    {</td></tr><tr><td class="line_no" line_no="20"></td><td class="code_column">        <span class="class">Console</span>.<span class="method">ResetColor</span>();</td></tr><tr><td class="line_no" line_no="21"></td><td></tr><tr><td class="line_no" line_no="22"></td><td class="code_column">        Text = <span class="string">&quot;&quot;</span>;</td></tr><tr><td class="line_no" line_no="23"></td><td class="code_column">        _sb.<span class="method">Clear</span>();</td></tr><tr><td class="line_no" line_no="24"></td><td></tr><tr><td class="line_no" line_no="25"></td><td class="code_column">        <span class="control">foreach</span> (<span class="keyword">var</span> <span class="localName">node</span> <span class="control">in</span> <span class="parameter">nodes</span>)</td></tr><tr><td class="line_no" line_no="26"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="27"></td><td class="code_column">            <span class="method">EmitNode</span>(<span class="localName">node</span>);</td></tr><tr><td class="line_no" line_no="28"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="29"></td><td></tr><tr><td class="line_no" line_no="30"></td><td class="code_column">        Text = _sb.<span class="method">ToString</span>();</td></tr><tr><td class="line_no" line_no="31"></td><td class="code_column">    }</td></tr><tr><td class="line_no" line_no="32"></td><td></tr><tr><td class="line_no" line_no="33"></td><td class="code_column">    <span class="keyword">public void</span> <span class="method">EmitNode</span>(<span class="class">Node</span> <span class="parameter">node</span>)</td></tr><tr><td class="line_no" line_no="34"></td><td class="code_column">    {</td></tr><tr><td class="line_no" line_no="35"></td><td class="code_column">        <span class="control">if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.ClassName)</td></tr><tr><td class="line_no" line_no="36"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="37"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Red;</td></tr><tr><td class="line_no" line_no="38"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="39"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.NamespaceName)</td></tr><tr><td class="line_no" line_no="40"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="41"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Green;</td></tr><tr><td class="line_no" line_no="42"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="43"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.Identifier)</td></tr><tr><td class="line_no" line_no="44"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="45"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Green;</td></tr><tr><td class="line_no" line_no="46"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="47"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.Keyword)</td></tr><tr><td class="line_no" line_no="48"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="49"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Yellow;</td></tr><tr><td class="line_no" line_no="50"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="51"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.StringLiteral)</td></tr><tr><td class="line_no" line_no="52"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="53"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Cyan;</td></tr><tr><td class="line_no" line_no="54"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="55"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.LocalName)</td></tr><tr><td class="line_no" line_no="56"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="57"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Blue;</td></tr><tr><td class="line_no" line_no="58"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="59"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.MethodName)</td></tr><tr><td class="line_no" line_no="60"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="61"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Red;</td></tr><tr><td class="line_no" line_no="62"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="63"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.Punctuation)</td></tr><tr><td class="line_no" line_no="64"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="65"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.White;</td></tr><tr><td class="line_no" line_no="66"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="67"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.Operator)</td></tr><tr><td class="line_no" line_no="68"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="69"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.White;</td></tr><tr><td class="line_no" line_no="70"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="71"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.ControlKeyword)</td></tr><tr><td class="line_no" line_no="72"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="73"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.DarkRed;</td></tr><tr><td class="line_no" line_no="74"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="75"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.VerbatimStringLiteral)</td></tr><tr><td class="line_no" line_no="76"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="77"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.DarkRed;</td></tr><tr><td class="line_no" line_no="78"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="79"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.StringLiteral)</td></tr><tr><td class="line_no" line_no="80"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="81"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.DarkGreen;</td></tr><tr><td class="line_no" line_no="82"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="83"></td><td class="code_column">        <span class="control">else if</span> (<span class="parameter">node</span>.ClassificationType == <span class="class">ClassificationTypeNames</span>.ParameterName)</td></tr><tr><td class="line_no" line_no="84"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="85"></td><td class="code_column">            <span class="class">Console</span>.ForegroundColor = <span class="class">ConsoleColor</span>.Yellow;</td></tr><tr><td class="line_no" line_no="86"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="87"></td><td class="code_column">        <span class="control">else</span></td></tr><tr><td class="line_no" line_no="88"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="89"></td><td class="code_column">            <span class="class">Console</span>.<span class="method">ResetColor</span>();</td></tr><tr><td class="line_no" line_no="90"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="91"></td><td></tr><tr><td class="line_no" line_no="92"></td><td class="code_column">        _sb.<span class="method">Append</span>(<span class="parameter">node</span>.TextWithTrivia);</td></tr><tr><td class="line_no" line_no="93"></td><td class="code_column">        <span class="class">Console</span>.<span class="method">Write</span>(<span class="string">$&quot;</span>{<span class="parameter">node</span>.TextWithTrivia}<span class="string">&quot;</span>);</td></tr><tr><td class="line_no" line_no="94"></td><td></tr><tr><td class="line_no" line_no="95"></td><td class="code_column">        <span class="control">if</span> (addDiagnosticInfo)</td></tr><tr><td class="line_no" line_no="96"></td><td class="code_column">        {</td></tr><tr><td class="line_no" line_no="97"></td><td class="code_column">            _sb.<span class="method">Append</span>(<span class="string">$&quot;(</span>{<span class="parameter">node</span>.ClassificationType}<span class="string">)&quot;</span>);</td></tr><tr><td class="line_no" line_no="98"></td><td class="code_column">            <span class="class">Console</span>.<span class="method">Write</span>(<span class="string">$&quot;(</span>{<span class="parameter">node</span>.ClassificationType}<span class="string">)&quot;</span>);</td></tr><tr><td class="line_no" line_no="99"></td><td class="code_column">        }</td></tr><tr><td class="line_no" line_no="100"></td><td></tr><tr><td class="line_no" line_no="101"></td><td class="code_column">        <span class="class">Console</span>.<span class="method">ResetColor</span>();</td></tr><tr><td class="line_no" line_no="102"></td><td class="code_column">    }</td></tr><tr><td class="line_no" line_no="103"></td><td class="code_column">}</td></tr></tbody>
</table></pre>

Second Example:

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using EnvDTE;
using Microsoft;
using Microsoft.VisualStudio.Shell;
using Microsoft.VisualStudio.Shell.Interop;
using Task = System.Threading.Tasks.Task;

namespace Roslyn.Compilers.Extension
{
    [Guid("31C0675E-87A4-4061-A0DD-A4E510FCCF97")]
    public sealed class CompilerPackage : AsyncPackage
    {
        public static string RoslynHive = null;

        protected override async Task InitializeAsync(CancellationToken cancellationToken, IProgress<ServiceProgressData> progress)
        {
            await base.InitializeAsync(cancellationToken, progress).ConfigureAwait(true);

            await JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);

            var reg = (ILocalRegistry2)await GetServiceAsync(typeof(SLocalRegistry)).ConfigureAwait(true);
            cancellationToken.ThrowIfCancellationRequested();
            Assumes.Present(reg);

            var packagePath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);

            string localRegistryRoot;
            reg.GetLocalRegistryRoot(out localRegistryRoot);
            var registryParts = localRegistryRoot.Split('\\');

            // Is it a valid Hive looks similar to:  
            //  'Software\Microsoft\VisualStudio\14.0'  'Software\Microsoft\VisualStudio\14.0Roslyn'  'Software\Microsoft\VSWinExpress\14.0'
            if (registryParts.Length >= 4)
            {
                var skuName = registryParts[2];
                var hiveName = registryParts[3];
                RoslynHive = string.Format(@"{0}.{1}", registryParts[2], registryParts[3]);

                await WriteMSBuildFilesAsync(packagePath, RoslynHive, cancellationToken).ConfigureAwait(true);

                try
                {
                    Microsoft.Build.Evaluation.ProjectCollection.GlobalProjectCollection.DisableMarkDirty = true;
                    Microsoft.Build.Evaluation.ProjectCollection.GlobalProjectCollection.SetGlobalProperty("RoslynHive", RoslynHive);
                }
                finally
                {
                    Microsoft.Build.Evaluation.ProjectCollection.GlobalProjectCollection.DisableMarkDirty = false;
                }
            }
        }

        private async Task WriteMSBuildFilesAsync(string packagePath, string hiveName, CancellationToken cancellationToken)
        {
            // A map of the file name to the content we need to ensure exists in the file
            var filesToWrite = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

            // The props we want to be included as early as possible since we want our tasks to be used and
            // to ensure our setting of targets path happens early enough
            filesToWrite.Add(await GetMSBuildRelativePathAsync($@"Imports\Microsoft.Common.props\ImportBefore\Roslyn.Compilers.Extension.{hiveName}.props", cancellationToken).ConfigureAwait(true),
                $@"<?xml version=""1.0"" encoding=""utf-8""?>
<Project xmlns=""http://schemas.microsoft.com/developer/msbuild/2003"">
  <PropertyGroup Condition=""'$(RoslynHive)' == '{hiveName}'"">
    <CSharpCoreTargetsPath>{packagePath}\Microsoft.CSharp.Core.targets</CSharpCoreTargetsPath>
    <VisualBasicCoreTargetsPath>{packagePath}\Microsoft.VisualBasic.Core.targets</VisualBasicCoreTargetsPath>
  </PropertyGroup> 

  <UsingTask TaskName=""Microsoft.CodeAnalysis.BuildTasks.Csc"" AssemblyFile=""{packagePath}\Microsoft.Build.Tasks.CodeAnalysis.dll"" Condition=""'$(RoslynHive)' == '{hiveName}'"" />
  <UsingTask TaskName=""Microsoft.CodeAnalysis.BuildTasks.Vbc"" AssemblyFile=""{packagePath}\Microsoft.Build.Tasks.CodeAnalysis.dll"" Condition=""'$(RoslynHive)' == '{hiveName}'"" />
</Project>");

            // This targets content we want to be included later since the project file might touch UseSharedCompilation
            var targetsContent =
                    $@"<?xml version=""1.0"" encoding=""utf-8""?>
<Project xmlns=""http://schemas.microsoft.com/developer/msbuild/2003"">
  
  <PropertyGroup Condition=""'$(RoslynHive)' == '{hiveName}' and '$(UseSharedCompilation)' == 'false'"">
    <CscToolPath>{packagePath}</CscToolPath>
    <CscToolExe>csc.exe</CscToolExe>
    <VbcToolPath>{packagePath}</VbcToolPath>
    <VbcToolExe>vbc.exe</VbcToolExe>
  </PropertyGroup>
</Project>";

            filesToWrite.Add(await GetMSBuildRelativePathAsync($@"Microsoft.CSharp.targets\ImportBefore\Roslyn.Compilers.Extension.{hiveName}.targets", cancellationToken).ConfigureAwait(true), targetsContent);
            filesToWrite.Add(await GetMSBuildRelativePathAsync($@"Microsoft.VisualBasic.targets\ImportBefore\Roslyn.Compilers.Extension.{hiveName}.targets", cancellationToken).ConfigureAwait(true), targetsContent);

            // First we want to ensure any Roslyn files with our hive name that we aren't writing -- this is probably
            // leftovers from older extensions
            var msbuildDirectory = new DirectoryInfo(await GetMSBuildPathAsync(cancellationToken).ConfigureAwait(true));
            if (msbuildDirectory.Exists)
            {
                foreach (var file in msbuildDirectory.EnumerateFiles($"*Roslyn*{hiveName}*", SearchOption.AllDirectories))
                {
                    if (!filesToWrite.ContainsKey(file.FullName))
                    {
                        file.Delete();
                    }
                }
            }

            try
            {
                foreach (var fileAndContents in filesToWrite)
                {
                    var parentDirectory = new DirectoryInfo(Path.GetDirectoryName(fileAndContents.Key));
                    parentDirectory.Create();

                    // If we already know the file has the same contents, then we can skip
                    if (File.Exists(fileAndContents.Key) && File.ReadAllText(fileAndContents.Key) == fileAndContents.Value)
                    {
                        continue;
                    }

                    File.WriteAllText(fileAndContents.Key, fileAndContents.Value);
                }
            }
            catch (Exception e)
            {
                var msg =
$@"{e.Message}

To reload the Roslyn compiler package, close Visual Studio and any MSBuild processes, then restart Visual Studio.";

                VsShellUtilities.ShowMessageBox(
                    this,
                    msg,
                    null,
                    OLEMSGICON.OLEMSGICON_WARNING,
                    OLEMSGBUTTON.OLEMSGBUTTON_OK,
                    OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST);
            }
        }


        private async Task<string> GetMSBuildVersionStringAsync(CancellationToken cancellationToken)
        {
            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);

            var dte = (DTE)await GetServiceAsync(typeof(SDTE)).ConfigureAwait(true);
            var parts = dte.Version.Split('.');
            if (parts.Length != 2)
            {
                throw new Exception($"Unrecognized Visual Studio Version: {dte.Version}");
            }

            int majorVersion = int.Parse(parts[0]);

            if (majorVersion >= 16)
            {
                // Starting in Visual Studio 2019, the folder is just called "Current". See
                // https://github.com/Microsoft/msbuild/issues/4149 for further commentary.
                return "Current";
            }
            else
            {
                return majorVersion + ".0";
            }
        }

        private async Task<string> GetMSBuildPathAsync(CancellationToken cancellationToken)
        {
            var version = await GetMSBuildVersionStringAsync(cancellationToken).ConfigureAwait(true);
            var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
            return Path.Combine(localAppData, $@"Microsoft\MSBuild\{version}");
        }

        private async Task<string> GetMSBuildRelativePathAsync(string relativePath, CancellationToken cancellationToken)
        {
            return Path.Combine(await GetMSBuildPathAsync(cancellationToken).ConfigureAwait(true), relativePath);
        }
    }
}

<a name="ex2">Generated HTML inside Browser:</a>

img

Product Compatible and additional computed target framework versions.
.NET net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on CsharpToColouredHTML.Core:

Package Downloads
Markdown.ColorCode.CSharpToColoredHtml

An extension for Markdig that adds syntax highlighting to code through the power of ColorCode, boosted with the CsharpToColouredHTML.Core package.
StatiCSharp.Parser.CSharpToColoredHtml

This is a port of Swiftly1's CsharpToColouredHTML for StatiC#, a static website generator for C# developers. C# code parts of your markdown files are rendered to look as if it was inside Visual Studio or Visual Studio Code.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.44 1,145 3/24/2024
1.0.43 135 3/24/2024 1.0.43 is deprecated because it has critical bugs.
1.0.42 395 2/17/2024
1.0.41 429 9/2/2023
1.0.40 249 5/1/2023
1.0.39 279 3/18/2023
1.0.38 330 1/31/2023
1.0.37 377 12/27/2022
1.0.36 341 12/8/2022
1.0.35 384 11/28/2022
1.0.34 379 11/21/2022
1.0.33 366 11/18/2022
1.0.32 393 11/11/2022
1.0.31 385 11/10/2022
1.0.30 403 11/9/2022
1.0.29 421 10/30/2022
1.0.28 424 10/3/2022
1.0.27 438 9/17/2022
1.0.26 457 9/11/2022
1.0.25 466 9/10/2022
1.0.24 485 8/20/2022
1.0.23 455 8/14/2022
1.0.22 492 7/15/2022
1.0.21 513 7/14/2022
1.0.20 497 7/13/2022
1.0.19 525 7/13/2022
1.0.18 470 7/7/2022
1.0.17 486 7/7/2022
1.0.16 503 6/26/2022
1.0.15 514 6/26/2022
1.0.14 494 6/21/2022
1.0.13 501 6/16/2022
1.0.12 472 6/16/2022
1.0.11 548 1/30/2022
1.0.10 496 1/22/2022
1.0.9 503 1/20/2022
1.0.8 511 1/20/2022
1.0.7 509 1/17/2022
1.0.6 561 1/17/2022 1.0.6 is deprecated because it has critical bugs.
1.0.5 547 1/17/2022 1.0.5 is deprecated.
1.0.4 342 12/31/2021
1.0.3 333 12/31/2021
1.0.2 337 12/31/2021
1.0.1 339 12/28/2021
1.0.0 383 12/15/2021