using System;

public class Program

{

    public static void Main()

    {

        var templatedBase = new Templated<Base>();

        var myBase = new Base();

        var myDerived = new Derived();

        templatedBase.Test(myBase);

        templatedBase.Test(myDerived);

        var templatedDerived = new Templated<Derived>();

        templatedDerived.Test(myDerived);

    }

}

​

public class Base : ICloneable

{

    public virtual object Clone() 

    {

        return new Base();

    }

}

​

public class Derived : Base

{

    public override object Clone() 

    {

        return new Derived();

    }

}

​

public class Templated<T> where T : Base 

{

    public void Test(T input) 

    {

        var clone = input.Clone();

        Console.WriteLine(clone.GetType());

    }

}