// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002499/object-tonullablebooleanordefault

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        object thisValid = true;

        object thisNull = null;

        object thisInvalid = "FizzBuzz";

        string format = "{0, -20} {1, -15}";

        Console.WriteLine(format, "Object", "ToNullableBooleanOrDefault");

        Console.WriteLine(format, "------", "--------------------------");

        // C# Extension Method: Object - ToNullableBooleanOrDefault

        Console.WriteLine(format, thisValid, thisValid.ToNullableBooleanOrDefault());

        Console.WriteLine(format, "null", thisNull.ToNullableBooleanOrDefault());

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault());

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault(false));

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault(() => false));

    }

}