The following situation happened to other developers before:
 
When you are using the Visual Studio IDE to include the " CuteEditor" folder into your Visual Studio project, it prompts you to create a code-behind file for the *.aspx.

If you select "Yes", the a new code-behind files will be created by the Visual Studio IDE.

But the new code-behind files are empty.
 
Can you check your project?

Steps to fix this problem:

1. Delete all the files in CuteEditor fodler.

2. Copy "CuteEditor" folder into your Visual Studio project again, when prompts you to create a code-behind file for the *.aspx, please select "NO" .

 

Hope it helps.

 

I will answer the rest questions as soon as possible.