Hide in Files

[DanielM]

If anybody can teach me, how in C# we can hide text in a Picture File, and
how to read it afterwards/

 

[polaris431]

I believe that this is referred to a "watermark". There are algorithms
published that show how to do this. Google "watermark" and "c#".

 

[Laurent Bugnion]

Hi,

If anybody can teach me, how in C# we can hide text in a Picture File, and
how to read it afterwards/

Additionally to DanielM's answer, if it's not watermark you refer to,
but EXIF meta information, you can check this:

http://msdn2.microsoft.com/en-us/library/system.drawing.imaging.propertyitem.aspx

Note: Not all image types support EXIF

HTH,
Laurent