// C# Extension Method
// Doc: https://csharp-extension.com/en/method/1002225/char-to
// @nuget: Z.ExtensionMethods
using System;
using System.Collections.Generic;
public class Program
{
public static void Main()
char input = 'E';
// C# Extension Method: Char - To
var output = input.To('F');
foreach(var c in output)
Console.WriteLine(c);
}