The length to be used by the Server for the response body on a stream connection (a minimum length, however, is ensured by the server). After the content length exhaustion, the connection will be closed and a new connection will be automatically reopened. If it is 0, the length is decided by the Server. 

The default setting is set to a very high value (50 millions). 

public: __property long ContentLength;

public long ContentLength;

Public Property ContentLength() As long