system io.ioException (null)

System.IO.IOException : There is not enough space on the disk.

at System.IO._Error.WinIOError. (int 32 error code,String may be full path).
at System.IO.FileStream.WriteCore (Byte[] buffer,Int 32 offset,Int 32 count).
at System.IO.FileStream.FlushWrite (Boolean called From Finalizer).
at System.IO.FileStream.Dispose (Boolean disposing).
at System.IO.Stream.close().
at System.IO.StreamWriter.Dispose (Boolean disposing).
at System.IO.TextWriter.Dispose().
at PaintDotNet.startup.Unhandled Exception (Exception ex) in
D:\src\pdn\pdn_35x\src\PaintDotNet\startup.cs:line 515.
at PaintDotNet.startup.Application_ThreadException(object sender,Thread exception Event Args e)in
D:\src\pdn\pdn_35x\src\PaintDotNet\startup.cs:line 544.
at System.Windows.Forms.Application.TreadContext.On ThreadException(Exception t).
at System.Windows.Forms.Control.WndProcException(Exception e).
at System.Windows.Forms.ControlNativeWindow.On ThreadException (Exception e).
at System.Windows.Forms.Native Window.Callback(IntPtr hWnd .Int32 msg,IntPtr wparam,IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at
System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethdwComponentID,Int32 reason,Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason,ApplicationContext context)
at System.Windows.Forms.Application .Run(Form mainForm)
at PaintDotNet.Startup.StartPart4(String mutexName) in
D:\src\pdn\pdn_35x\src\PaintDotNet\Startup.cs:line 432
at PaintDotNet.Startup.StartPart30 in D:\src\pdn\pdn_35x\src\PaintDotNet\Startup.cs:line 375
at PaintDotNet.Startup.StartPart20 in D:\src\pdn\pdn_35x\src\PaintDotNet\Startup.cs:line 356
at PaintDotNet.Startup.Start() in D:\src\pdn\pdn_35x\src\PaintDotNet\Startup.cs:line 269
at PaintDotNet.Startup.Main(String[] args) in D:\src\pdn\pdn_35x\src\PaintDotNet\Startup.cs:line 463

If any user try to save their files to the disk,where there is no enough memory available,then there is a chance for facing such an error.So,here the solution is to free the disk space by using system tools like optimization or by any other private software.

Recommended :
scratch disk full (adobe photoshop).