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Add non-nullable reference types in C#

Non-nullability checks have to be manually encoded hundreds of times in any large real-world project, and they are not compile-time-enforced. There are code contracts in .Net 4.0, but their usage is still very verbose, and only partly compile-time-enforced.

What I wish is a pendant to the null-lifting operator ?, for instance, !, so that one could write:
void MyMethod(string! s){ /* s cannot be null :) */}

Or, the way ReSharper does it:
void MyMethod([NotNull] string s){ /* s cannot be null :) */}

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Marc Sigrist shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

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