/// <summary>
/// Initiates the operation to gets a handle to the request content.
/// </summary>
/// <param name="callback">The async callback invoked when the operation completes.</param>
/// <param name="state">The state object to be passed to the async callback.</param>
/// <returns>IAsyncResult that represents an async operation.</returns>
public IAsyncResult BeginGetRequestContent(AsyncCallback callback, object state)
{
// The WWW API only allows representing the request body as a string,
// it does not have a method which returns the request stream.
// Invoke the callback synchronously to indicate that this method has completed execution.
var result = new SimpleAsyncResult(state);
//Invoke the callback synchronously
callback(result);
return(result);
}