public static void EndCopy(IAsyncResult ar)
{
StreamCopyState result = (StreamCopyState)ar;
if (result.Error != null)
{
throw result.Error;
}
}
public static IAsyncResult BeginCopy(Stream from, Stream to, AsyncCallback callback, object state)
{
byte[] buffer = new byte[32768];
StreamCopyState asyncState = new StreamCopyState(from, to, buffer, callback, state);
from.BeginRead(buffer, 0, buffer.Length, asyncState.DataRead, null);
return(asyncState);
}