Someone wrote a detailed analysis of why it was not easy to extend C# to support not-null, ie, print (string! msg), anyone have a link?
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@jsonmez Unless it's guaranteed not to be null, i.e. I can see how you can get away with it in F# since guarantees are baked into the lang.
@demisbellot Code Contracts static analysis can actually detect if your code could ever create a NRE.