Write hidden messages to image file c#

I was looking for a tutorial where is described how to write/read hidden text into image file using C#, but unfortunately I din;t find any good posts about this, so I decided to ask here about this small trick.

Suppose I have an image file called test.jpg , is there any way to write an hidden text like "Hello word " to this file ? I have read about image metadata , and I suppose that I should try to write somehow to this metadata , but I din;t find how. If anybody know how to do it , please help me to understand how to it. Thanks.