Dos and Don'ts of stackalloc

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In .NET Core 2.1 a small but well-received feature was the ability to “safely” allocate a segment of data on the stack, using stackalloc , when used with Span<T> . Before Span<T> , stackalloc required being in an unsafe context: unsafe { byte * data = stackalloc byte [ 256 ]; } The use of unsafe , along with the little number of APIs in .NET that could work with pointers, was enough to deter a lot…

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