Basic working program.

It will merge PDFs from a directory. Configuration is currently all
manual.

Program.cs

@@ -6,12 +6,13 @@ namespace PDF_Merge
         ///  The main entry point for the application.
         /// </summary>
         [STAThread]
+        
         static void Main()
         {
             // To customize application configuration such as set high DPI settings or default font,
             // see https://aka.ms/applicationconfiguration.
             ApplicationConfiguration.Initialize();
-            Application.Run(new Form1());
+            Application.Run(new MainForm());
         }
     }
 }