Once in the past, I was wondering how many times I had written null checks in C# so far. It must have been at least ten thousand times. Later, I discovered F#, which avoids null in most cases. Seeing that "in principle, it can be done in .NET languages", I wrote a Visual Studio User Voice suggestion to add compile-time null reference checking to C#. The suggestion quickly rose to the top and stayed there until today. Finally... Six yea[...]