C#リフレクションメモ2

reflection2.cs

var source = @"
using System;
using System.Text;
using System.Runtime;
using System.Linq;
public class Test1
{
    public static string Message(string message)
    {
        return message;
    }
}
public class Test2
{
    public static string Message(string message)
    {
        return message;
    }
}
";

string assemblyName = Path.GetRandomFileName();
var syntaxTree = CSharpSyntaxTree.ParseText(source);

var references = new MetadataReference[]
{
    MetadataReference.CreateFromFile(typeof(object).Assembly.Location),
    MetadataReference.CreateFromFile(typeof(Enumerable).Assembly.Location),
    MetadataReference.CreateFromFile(typeof(Console).Assembly.Location)
};

var compilationOptions = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);

var compilation = CSharpCompilation.Create(assemblyName, new[] { syntaxTree }, references, compilationOptions);

using (var ms = new MemoryStream())
{
    EmitResult result = compilation.Emit(ms);

    if (!result.Success)
    {
        IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
            diagnostic.IsWarningAsError ||
            diagnostic.Severity == DiagnosticSeverity.Error);

        foreach (Diagnostic diagnostic in failures)
        {
            Console.Error.WriteLine("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
        }
    }
    else
    {
        ms.Seek(0, SeekOrigin.Begin);

        Assembly assembly = Assembly.Load(ms.ToArray());
        Type test1Type = assembly.GetType("Test1");
        Type test2Type = assembly.GetType("Test2");
        MethodInfo messageMethod1 = test1Type.GetMethod("Message");
        MethodInfo messageMethod2 = test2Type.GetMethod("Message");

        var res1 = (string)messageMethod1.Invoke(null, new[] { "Hello from Test1!" });
        var res2 = (string)messageMethod1.Invoke(null, new[] { "Hello from Test2!" });
        Console.WriteLine(res1);
        Console.WriteLine(res2);
    }
}