Using the HttpClient API from wcf.codeplex.com, you may encounter this error if respones are too large.  

Cannot write more bytes to the buffer than the configured maximum buffer size: 65536

In order to increase the size of the Response Buffer, just increase the MaxReseponseContentBufferSize as shown below. Increase it to something larger than the default: 65536 depending on your response sizes.

     
            var client = new HttpClient
                             {
                                 MaxResponseContentBufferSize = 196608,
                                 BaseAddress = new Uri("http://myservice/service1/")
                                 
                             };