public static void Main()
string _filePath = @"C:\Users\Username\source\repos\projectname\projectname\bin\Debug\net5.0-windows";
string combined1 = System.IO.Path.Combine(_filePath, "test.txt");
Console.WriteLine(combined1);
string combined2 = _filePath + @"\test.txt";
Console.WriteLine(combined2);
string combined3 = _filePath + "\\test.txt";
Console.WriteLine(combined3);