public static int WriteFile(UIntPtr hFile, byte[] buffer, uint bytesToWrite, uint offset, out uint numberBytesWritten)
{
GCHandle hBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
int ret = m_fileSystemIo.WriteFile(hFile, (UIntPtr)((uint)hBuffer.AddrOfPinnedObject() + offset), bytesToWrite, out numberBytesWritten);
hBuffer.Free();
return(ret);
}
public static int ReadFile(IntPtr hfile, byte[] buffer, int nNumberOfBytesToRead, int offset, out int lpNumberOfBytesRead)
{
GCHandle bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
int ret = m_fileSystemIo.ReadFile(hfile, new IntPtr(bufferHandle.AddrOfPinnedObject().ToInt32() + offset),
nNumberOfBytesToRead,
out lpNumberOfBytesRead);
bufferHandle.Free();
if (ret != 0)
{
if (ret == ERROR_ACCESS_DENIED)
{
throw new UnauthorizedAccessException("Access denied");
}
}
return(ret);
}
