Loading an assembly generated by the Roslyn compiler

Question

I\'m generating a Greeter.dll using the Roslyn compiler. My problem occurs trying to load the DLL file.

Here\'s the code:

using System;

using Rosly         


        

Answer 1

This code worked beautifully:

using System;

using Roslyn.Compilers;
using Roslyn.Compilers.CSharp;

using System.IO;
using System.Reflection;
using System.Linq;

namespace LoadingAClass
{
    class Program
    {
        static void Main(string[] args)
        {
            var syntaxTree = SyntaxTree.ParseCompilationUnit(@"
using System;
namespace HelloWorld
{
    class Greeter
    {
        public static void Greet()
        {
            Console.WriteLine(""Hello, World"");
        }
    }
}");

            string dllPath = Path.Combine(Directory.GetCurrentDirectory(), "Greeter.dll");
            string pdbPath = Path.Combine(Directory.GetCurrentDirectory(), "Greeter.pdb");

            var compilation = Compilation.Create(dllPath,
                new CompilationOptions(
                    assemblyKind: AssemblyKind.DynamicallyLinkedLibrary
                ))
                .AddSyntaxTrees( syntaxTree )
                .AddReferences(new AssemblyFileReference(typeof(object).Assembly.Location))
                .AddReferences(new AssemblyFileReference(typeof(Enumerable).Assembly.Location));

            EmitResult result;

            using (FileStream dllStream = new FileStream(dllPath, FileMode.OpenOrCreate))
            using (FileStream pdbStream = new FileStream(pdbPath, FileMode.OpenOrCreate))
            {
                result = compilation.Emit(
                    executableStream: dllStream,
                    pdbFileName: pdbPath,
                    pdbStream: pdbStream);
            }

            if (result.Success)
            {
                //assembly = Assembly.LoadFile(Path.Combine(Directory.GetCurrentDirectory(), @"Greeter.dll"));
                Assembly assembly = Assembly.LoadFrom(@"Greeter.dll");

                Type type = assembly.GetType("HelloWorld.Greeter");
                var obj = Activator.CreateInstance(type);

                type.InvokeMember("Greet",
                    BindingFlags.Default | BindingFlags.InvokeMethod,
                    null,
                    obj,
                    null);
            }
            else
            {
                Console.WriteLine("No Go");
                Console.WriteLine(result.Diagnostics.ToString());
            }

            Console.WriteLine(" to continue");
            Console.ReadLine();

        }
    }
    // Thanks, http://blogs.msdn.com/b/csharpfaq/archive/2011/11/23/using-the-roslyn-symbol-api.aspx
    // Thanks, http://social.msdn.microsoft.com/Forums/en-US/roslyn/thread/d620a4a1-3a90-401b-b946-bfa1fc6ad7a2
}