Does MemoryStream Copy on construction?

Question

When you construct a MemoryStream from a byte array, does the stream make its own copy? If, so is this a performance concern in a high performance scenario, when compared to just reading the bytes from the original array directly?

Answer 1

It doesn't seem to be explicitly mentioned in the documentation, but keep in mind that you can use MemoryStream to modify an existing byte[]. That wouldn't make any sense if the byte array was copied.

Referring to .NET Reference Source, no copy is made on the byte array.