. Net C # bug (temporarily named Bug)

See the following function for writing data to the sending Buffer Queue.

 ///   <Summary>  ///  Sending cache area  ///   </Summary>  ///   <Param name = "content"> </param>  ///   <Param name = "bufferoffset"> </param>  ///   <Param name = "senderbuffer"> </param>  Private   Void Writesendbuffer (String Content, Int Bufferoffset, Byte  [] Sendbuffer ){  Int Bytelength = Encoding. utf8.getbytecount (content );  If (Bytelength <= Sendbuffer. Length ){  Byte [] Sendbytes = Encoding. utf8.getbytes (content );  // Encoding. utf8.getbytes (content, 0, bytelength, senderbuffer, bufferoffset) will be incorrect at noon );  //  Replacing the above with an array copy will solve the problem. Array. Copy (sendbytes, 0 , Sendbuffer, bufferoffset, bytelength ); //  Copy to Data Packet Buffer  }} 

Note that the getbytes of utf8 does not have any Chinese Character in the content. If it is ASCII, it is also a problem. However, if unioncode is used and there is a Chinese character, the array is out of bounds directly. The error message is:

The index and Count must reference the position in the string.

It is estimated that this is a bug in. net. It must be because the Chinese bytes have not been properly processed. Is there an analysis principle?

This error is reported if I haven't written. Net for a long time.