using System;

public class Program

{

    public static void Main()

    {

    Console.WriteLine(IsBoxed( (ValueType)42));   

    Console.WriteLine(IsBoxed(42));   

    Console.WriteLine(IsBoxed((object)42)); 

    Console.WriteLine(IsBoxed((IComparable)42));    

    }

    public static bool IsBoxed<T>(T value)

    {

     return !typeof(T).IsValueType && value != null && value.GetType().IsValueType;

}

​

}