What C# language features help you to reduce lines of code and improve readability? [closed]

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I came across a C# language feature today courtesy of ReSharper, the ?? operator. This helped make the code even more concise than my initial attempt. See below for iteration in improving lines/length/readability of code.

A first attempt could be something like..

if (usersEmail == null)
  userName = firstName;
else
  userName = usersEmail;

Refactored to..

userName = usersEmail == null ? firstName : usersEmail;

Initially I thought the above would be the most efficient/concise version, but there is a third step...

userName = usersEm开发者_开发问答ail ?? firstName;

Id like to know if you have any similar examples where C# language features help with reducing lines of code and improving readability?

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the using block, LINQ, anonymous delegates, the list would just go on..

C# has a very nice habit of introducing features in every major release that cut down the amount of code that you have to write.

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The var keyword for implicit static typing and automatic properties are two good examples.

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This thread has a lot of gems: Hidden Features of C#? (including the one you mentioned)

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Using using keyword

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Extension methods.

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LINQ queries allowing you to express the query criteria better than a foreach loop