WPF RenderTargetBitmap Zoom ClearType Text to GreyScale

Question

Possible duplicate:
WPF RenderTargetBitmap with downsizing TextRenderMode to GreyScale

I am writing an image editing program in WPF, Photoshop style.

I ran into a huge obstacle while rendering the text. When I save the canvas to PNG using the RenderTargetBitmap, it reduces the text quality of the text to shades of gray and fairly honestly looks awful and leaves the application useless for the task.

Unfortunately, I did not expect such a restriction when deciding on the use of WPF.

Does anyone have a job or an alternative to RenderTargetBitmap to save the canvas in PNG. Or, in any case, to prevent the "scaling down" function

I read the ms error message that this is a "restriction is not an error", but I hope there is some alternative

Many thanks

Tommy