/// <summary>
/// Starts switching to SSL.
/// </summary>
/// <returns>An IAsyncResult that references the asynchronous operation.</returns>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and this method is accessed.</exception>
/// <exception cref="InvalidOperationException">Is raised when POP3 client is not connected or is authenticated or is already secure connection.</exception>
public IAsyncResult BeginStartTLS(AsyncCallback callback, object state)
{
if (IsDisposed)
{
throw new ObjectDisposedException(GetType().Name);
}
if (!IsConnected)
{
throw new InvalidOperationException("You must connect first.");
}
if (IsAuthenticated)
{
throw new InvalidOperationException(
"The STLS command is only valid in non-authenticated state.");
}
if (IsSecureConnection)
{
throw new InvalidOperationException("Connection is already secure.");
}
StartTLSDelegate asyncMethod = StartTLS;
AsyncResultState asyncState = new AsyncResultState(this, asyncMethod, callback, state);
asyncState.SetAsyncResult(asyncMethod.BeginInvoke(asyncState.CompletedCallback, null));
return(asyncState);
}
public IAsyncResult BeginStartTLS(AsyncCallback callback,object state)
{
if(this.IsDisposed){
throw new ObjectDisposedException(this.GetType().Name);
}
if(!this.IsConnected){
throw new InvalidOperationException("You must connect first.");
}
if(this.IsSecureConnection){
throw new InvalidOperationException("Connection is already secure.");
}
StartTLSDelegate asyncMethod = new StartTLSDelegate(this.StartTLS);
AsyncResultState asyncState = new AsyncResultState(this,asyncMethod,callback,state);
asyncState.SetAsyncResult(asyncMethod.BeginInvoke(new AsyncCallback(asyncState.CompletedCallback),null));
return asyncState;
}
