using System;

using System.Reflection;

​

public static class Program

{

    public static void Main()

    {

        MethodInfo methodToInvoke = typeof(MyClass).GetMethod(

            "myFunc", 

            new System.Type[] { typeof(BaseClass) });

​

        var result = methodToInvoke

            .Invoke(new MyClass(), new object[] { new BaseClass() });

​

        Console.WriteLine(result);      

    }

​

    public class MyClass

    {

        public static string myFunc(BaseClass bc) {

            return "BaseClass";

        }

​

        public static string myFunc(DerivedClass dc) {

            return "DerivedClass";

        }

    }

​

    public class BaseClass { }

    public class DerivedClass : BaseClass { }

}