Use 'is' for int value type : Integer Family « Data Type « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Type
3. Integer Family

using System;

public class MainClass
{
    static void Main() {
        int j = 123;
        object boxed = j;
        object obj = new Object();

        Console.WriteLine( "boxed {0} int", boxed is int ? "is" : "isnot" );
        Console.WriteLine( "obj {0} int", obj is int ? "is" : "isnot" );
        Console.WriteLine( "boxed {0} System.ValueType", boxed is ValueType ? "is" : "isnot" );

    }
}

boxed is int
obj isnot int
boxed is System.ValueType