// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002515/object-tonullableguidordefault

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        object val1 = "ca761232ed4211cebacd00aa0057b223";

        object val2 = "{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0xB2, 0x23}}";

        object thisNull = null;

        object thisInvalid = "A100";

        string format = "{0, -100} {1, -15}";

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

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

        // C# Extension Method: Object - ToNullableGuidOrDefault

        Console.WriteLine(format, val1, val1.ToNullableGuidOrDefault());

        Console.WriteLine(format, val2, val2.ToNullableGuidOrDefault());

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

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

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableGuidOrDefault(Guid.NewGuid()));

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableGuidOrDefault(() => Guid.NewGuid()));

    }

}