O2 Script - Original Roslyn 'AddingMethodToClass' method

gistfile1.cs

var tree = SyntaxTree.ParseCompilationUnit(@"
class C
{
}");

var compilationUnit = (CompilationUnitSyntax)tree.GetRoot();

// Get ClassDeclarationSyntax corresponding to 'class C' above.
ClassDeclarationSyntax classDeclaration = compilationUnit.ChildNodes()
    .OfType<ClassDeclarationSyntax>().Single();

// Construct a new MethodDeclarationSyntax.
MethodDeclarationSyntax newMethodDeclaration =
    Syntax.MethodDeclaration(Syntax.ParseTypeName("void"), "M")
        .WithBody(Syntax.Block());

// Add this new MethodDeclarationSyntax to the above ClassDeclarationSyntax.
ClassDeclarationSyntax newClassDeclaration =
    classDeclaration.AddMembers(newMethodDeclaration);

// Update the CompilationUnitSyntax with the new ClassDeclarationSyntax.
CompilationUnitSyntax newCompilationUnit =
    compilationUnit.ReplaceNode(classDeclaration, newClassDeclaration);

// Format the new CompilationUnitSyntax.
newCompilationUnit = (CompilationUnitSyntax)newCompilationUnit.Format().GetFormattedRoot();
return newCompilationUnit.GetFullText();

//using Roslyn.Compilers;
//using Roslyn.Compilers.Common;
//using Roslyn.Compilers.CSharp;
//using Roslyn.Scripting;
//using Roslyn.Scripting.CSharp;
//using Roslyn.Services;

//O2Ref:O2_FluentSharp_Roslyn.dll
//O2Ref:Roslyn.Services.dll
//O2Ref:Roslyn.Compilers.dll
//O2Ref:Roslyn.Compilers.CSharp.dll