How to Escape String Literals in C#?

Convert string value to string literal with escape sequence in C#

In C#, you can convert a string value to a string literal with escape sequences using the following technique:

Original code:

<code class="language-csharp">Console.WriteLine(someString);</code>

Expected output:

<code>\tHello\r\n\tWorld!\r\n</code>

Method 1: Use C# StringWriter and CodeDomProvider

<code class="language-csharp">private static string ToLiteral(string input)
{
    using (var writer = new StringWriter())
    {
        using (var provider = CodeDomProvider.CreateProvider("CSharp"))
        {
            provider.GenerateCodeFromExpression(new CodePrimitiveExpression(input), writer, null);
            return writer.ToString();
        }
    }
}</code>

Example:

<code class="language-csharp">var input = "\tHello\r\n\tWorld!";
Console.WriteLine(input);
Console.WriteLine(ToLiteral(input));</code>

Output:

<code>    Hello
    World!
"\tHello\r\n\tWorld!"</code>

Method 2: Use Roslyn’s Microsoft.CodeAnalysis.CSharp package

<code class="language-csharp">private static string ToLiteral(string valueTextForCompiler)
{
    return Microsoft.CodeAnalysis.CSharp.SymbolDisplay.FormatLiteral(valueTextForCompiler, false);
}</code>

Example:

<code class="language-csharp">Console.WriteLine(ToLiteral("\tHello\r\n\tWorld!"));</code>

Output:

<code>"\tHello\r\n\tWorld!"</code>

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