System.IO.__ConsoleStream.ReadFileNative C# (CSharp) Méthode

        private unsafe static int ReadFileNative(SafeFileHandle hFile, byte[] bytes, int offset, int count, int mustBeZero, out int errorCode)
        {
            BCLDebug.Assert(offset >= 0, "offset >= 0");
            BCLDebug.Assert(count >= 0, "count >= 0");
            BCLDebug.Assert(bytes != null, "bytes != null");

            // Don't corrupt memory when multiple threads are erroneously writing
            // to this stream simultaneously.
            if (bytes.Length - offset < count)
                throw new IndexOutOfRangeException(Environment.GetResourceString("IndexOutOfRange_IORaceCondition"));

            // You can't use the fixed statement on an array of length 0.
            if (bytes.Length==0) {
                errorCode = 0;
                return 0;
            }

            int r;
            int numBytesRead;
            fixed(byte* p = bytes) {
                r = ReadFile(hFile, p + offset, count, out numBytesRead, Win32Native.NULL);
            }
            if (r==0) {
                errorCode = Marshal.GetLastWin32Error();
                if (errorCode == ERROR_BROKEN_PIPE) {
                    // A pipe into stdin was closed.  Not an error, but EOF.
                    return 0;
                }
                return -1;
            }
            else
                errorCode = 0;
            return numBytesRead;
        }