One of the interesting changes (not sure why Microsoft changed this) was moving/changing the Span<T> API’s a bit. For example, the Span<T>.NonPortableCast Method was moved as an extension method under MemoryMarshal.
Previous API
Span<byte> byteSpan = BitConverter.GetBytes(originalPrimitiveType); Span<int> intSpan = byteSpan.NonPortableCast<byte, int>();
Current API
Span<byte> byteSpan = BitConverter.GetBytes(originalPrimitiveType); Span<int> intSpan = MemoryMarshal.Cast<byte, int>(byteSpan);
Similarly, the string.AsReadonlySpan method has been renamed. The new API is as follows.
Previous API
ReadOnlySpan<char> keyString = "SomeText".AsReadOnlySpan();
Current API
ReadOnlySpan<char> keyString = "SomeText".AsSpan();
The MemoryMarshal extensions can be found under the System.Runtime.InteropServices namespace. Code discussed in my earlier post about Benchmarking Span has been updated in my Github.
ByteLanguage.Net 