How to compile a C# file with Roslyn programmatically?

Question

I read that you can\'t compile C# 6.0 with CSharpCodeProvider and therefor trying to do with with Roslyn. But I can\'t find a good example how to load a file and then compil

Answer 1

You have to use the NuGet package Microsoft.CodeAnalysis.CSharp.

var syntaxTree = CSharpSyntaxTree.ParseText(source);

CSharpCompilation compilation = CSharpCompilation.Create(
    "assemblyName",
    new[] { syntaxTree },
    new[] { MetadataReference.CreateFromFile(typeof(object).Assembly.Location) },
    new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));

using (var dllStream = new MemoryStream())
using (var pdbStream = new MemoryStream())
{
    var emitResult = compilation.Emit(dllStream, pdbStream);
    if (!emitResult.Success)
    {
        // emitResult.Diagnostics
    }
}