using System;

public class Program

{

    public static void Main()

    {

        var path1 = @"C:\test\temp123.yaml";

        var path2 = @"/test/temp123.yaml";

        Console.WriteLine(System.IO.Path.GetFileNameWithoutExtension(path1));

        Console.WriteLine(System.IO.Path.GetFileNameWithoutExtension(path2));

    }

}