so im just trying to make a game, and when i save it and close the program, and come back a while later, when i try to load it, it says "HP. dat is corrupt, Player.dat is corrupt" etc, then when I load it, everything is gone, this happens too many times, honestly its getting a bit annoying.

here's the error:

Source: mscorlib

Reason: Path cannot be null.

Parameter name: path

Stack trace:    at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)

   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)

   at System.IO.FileStream..ctor(String path, FileMode mode)

   at EasyFPSEditor15.Map.Save(Boolean prompt)

   at EasyFPSEditor15.Map.Reload()

   at EasyFPSEditor15.Editors.DecorationsEditor.DecorationsEditorFormClosing(Object sender, FormClosingEventArgs e)

   at System.Windows.Forms.Form.OnFormClosing(FormClosingEventArgs e)

   at System.Windows.Forms.Form.RaiseFormClosingOnAppExit()

   at System.Windows.Forms.Application.ExitInternal()

   at System.Windows.Forms.Application.Exit(CancelEventArgs e)

   at EasyFPSEditor15.Program.ThreadException(Object sender, ThreadExceptionEventArgs t)

   at System.Windows.Forms.Application.ThreadContext.OnThreadException(Exception t)

   at System.Windows.Forms.Control.WndProcException(Exception e)

   at System.Windows.Forms.Control.ControlNativeWindow.OnThreadException(Exception e)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

   at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, Int32 wParam, Int32 lParam)

   at System.Windows.Forms.Control.SendMessage(Int32 msg, Int32 wparam, Int32 lparam)

   at System.Windows.Forms.Form.Close()

   at EasyFPSEditor15.Editors.DecorationsEditor.Button3Click(Object sender, EventArgs e)

   at System.Windows.Forms.Control.OnClick(EventArgs e)

   at System.Windows.Forms.Button.OnClick(EventArgs e)

   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ButtonBase.WndProc(Message& m)

   at System.Windows.Forms.Button.WndProc(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)