using System;

public class Program

{

    public static T AssertAs<T>(object instance)

    {

        if(instance is T tValue)

        {

            return tValue;

        }

        return default(T);

    }

    public static void Main()

    {

        var toto = 42;

        var newValue = AssertAs<uint>(toto);

        Console.WriteLine(newValue);

    }

}