Set icon for specific files programmatically

Question

Hello,

 

With C#, I created a file with a .ui extension and I I would like to set an icon for all files with .ui extension.

 

Is it possible to do that with C# .NET?

 

If so, do you have a good example to do that, please?

 

For example, if I want to make an installer to install an app, how can I set an icon for files with .ui automatically?

 

Thanks.