Roslyn based metaprogram

Roslyn.cs

public static Assembly Compile(string[] sources, bool isDebug, string tempDir, params AssemblyName[] referencedAssemblies)
{
    var assemblyFileName = tempDir + "gen" + Guid.NewGuid().ToString().Replace("-", "") + ".dll";
    var assemblyPath = Path.GetFullPath(assemblyFileName);
 
    var compilation = Compilation.Create(assemblyFileName,
                                            new CompilationOptions(OutputKind.DynamicallyLinkedLibrary))
                                    .AddSyntaxTrees(from source in sources
                                                    select SyntaxTree.ParseCompilationUnit(source))
                                    .AddReferences(from ass in referencedAssemblies
                                                select new AssemblyFileReference(new Uri(ass.CodeBase).LocalPath))
                                                select new AssemblyObjectReference(Assembly.Load(ass)))
                                    .AddReferences(from ass in new[]
                                                {
                                                    "System",
                                                    "System.Core",
                                                    "mscorlib"
                                                }
                                                select new AssemblyNameReference(ass));
 
    EmitResult emitResult;
 
    using (var stream = new MemoryStream())
    using (var stream = new FileStream(assemblyPath, FileMode.Create, FileAccess.Write))
    {
        emitResult = compilation.Emit(stream);
    }
 
    if (!emitResult.Success)
    {
        var message = string.Join("\r\n", emitResult.Diagnostics);
        throw new ApplicationException(message);
    }
 
    return Assembly.LoadFile(assemblyPath);
}