How many keywords I can fit into a single C# expression?

As I was playing few days ago with “ yield return await “ I got an idea to try fit as much “keywords” as possible into one “expression”. I mean as much blue words (in Visual Studio’s default colors) as possible together (not separated by semicolon, comma, colon, bracket, etc.).

Obviously yield return await gives us 3 together. One can also do yield return this , yield return base or yield return sizeof(...) . But that’s still just 3. Can I do more? While I was waiting for my car on a yearly checkup, hence I was not mindlessly wasting time, I came up with 7.

class C { async Task Test() { switch (this) { case null when await this is false: break; } } public System.Runtime.CompilerServices.TaskAwaiter<bool?> GetAwaiter() => default; }