If you are a .NET developer you (I guess) work in Visual Studio and enjoy the power of IntelliSense. It helps you write things faster and from time to time reminds you of an extension method you wrote but have forgot about it.

It happened to me a few times in the last years that IntelliSense just stopped working from one moment to another and every time it took me quite a while to figure out what it was.

This time I want to be smart about it and write it down to be able to remind myself (and everyone reading this) what one of the solutions might be.

Simply go into TOOLS -> Options and under Text Editor -> All Languages -> General make sure to have Auto list members and Parameter information checked.