Adam Tegen Adam Tegen - 4 years ago 149
C++ Question

How do I convert an IntPtr to a Stream?

class Foo
static bool Bar(Stream^ stream);

class FooWrapper
bool Bar(LPCWSTR szUnicodeString)
return Foo::Bar(??);

will take a
but I'd like to do this without copying the data if possible.

Answer Source

You can avoid the copy if you use an UnmanagedMemoryStream() instead (class exists in .NET FCL 2.0 and later). Like MemoryStream, it is a subclass of IO.Stream, and has all the usual stream operations.

Microsoft's description of the class is:

Provides access to unmanaged blocks of memory from managed code.

which pretty much tells you what you need to know. Note that UnmanagedMemoryStream() is not CLS-compliant.

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