MethodInvoker.cs

public static class MethodInvoker
{
    public static object InvokeMethod(string methodName, object[] paramaters = null)
    {
        MethodInfo method = ResolveMethodWithName(methodName);
        if (method == null)
            throw new InvalidOperationException("A method with the name " + methodName + " cannot be found.");

        if (method.IsStatic)
        {
            return method.Invoke(null, paramaters);
        }

        if (method.DeclaringType != null)
        {
            object instance = Activator.CreateInstance(method.DeclaringType);
            return method.Invoke(instance, paramaters);
        }

        throw new InvalidOperationException("This Should Never Throw Unless I Forgot Something");
    }

    private static MethodInfo ResolveMethodWithName(string methodName)
    {
        Assembly executingAssembly = Assembly.GetExecutingAssembly();

        return executingAssembly
            .GetTypes()
            .SelectMany(type => type.GetMethods(MethodBindingFlags))
            .FirstOrDefault(method => method.Name == methodName);
    }

    private const BindingFlags MethodBindingFlags =
            BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic |
            BindingFlags.Instance | BindingFlags.Static;
}