How to make text of image editor in website? platform .net

I show many editors in websites like stackoverflow and w3school.

i want to develop that type of editor in my website.

tell me how can i develop that text editor. 开发者_C百科where i can put any language code.

and also formatting it like stackoverflow.

and can i put picture directly pasted in that editor .. if i want to show any screen shot of any coding or design.

free editors required.

thanks for any help.

If you want to use an editor that is capable of adding an image to editable text such as the one here on SO, look into CKEditor or TinyMCE. If you want to develop your own, TinyMCE is open source and would make a good start.