// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002448/object-isassignablefrom

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

       var stringObject = (object) "FizzBuzz";

​

       // C# Extension Method: Object - IsAssignableFrom

       bool result1 = stringObject.IsAssignableFrom(typeof (string)); // return true;

       bool result2 = stringObject.IsAssignableFrom<string>(); // return true;

       bool result3 = stringObject.IsAssignableFrom<object>(); // return false;

       bool result4 = stringObject.IsAssignableFrom<int>(); // return false;

       Console.WriteLine("IsAssignableFrom(typeof (string)): {0}", result1);

       Console.WriteLine("IsAssignableFrom<string>(): {0}", result2);

       Console.WriteLine("IsAssignableFrom<object>(): {0}", result3);

       Console.WriteLine("IsAssignableFrom<int>(): {0}", result4);

    }

}