using System;

public class Program

{

    public static void Main()

    {

        string input1 = "aaaa987623-34524-34523-6543";

        string input2 = "797c45b8-f4d9-4235-82dd-d41fd9092473";

        string input3 = "!£$%^&*()_+}~@:?><,./;'#][=-";

        string input4 = "797c45b8f4d9423582ddd41fd9092473";

​

        Console.WriteLine("1. Is valid GUID: " + Guid.TryParse(input1, out _));

        Console.WriteLine("2. Is valid GUID: " + Guid.TryParse(input2, out _));

        Console.WriteLine("3. Is valid GUID: " + Guid.TryParse(input3, out _));

        Console.WriteLine("4. Is valid GUID: " + Guid.TryParse(input4, out var guidPostValidation));

        Console.WriteLine("New Guid: " + guidPostValidation);

    }

}