// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002503/object-tonullablecharordefault

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        object val1 = 'a';

        object val2 = '-';

        object thisNull = null;

        object thisInvalid = "FizzBuzz";

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

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

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

        // C# Extension Method: Object - ToNullableCharOrDefault

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

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

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

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

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableCharOrDefault('.'));

        Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableCharOrDefault(() => '.'));

    }

}