System.Net.WebConnection.ReadHeaders C# (CSharp) Method

		WebHeaderCollection ReadHeaders (HttpWebRequest request, Stream stream, out byte [] retBuffer, out int status)
		{
			retBuffer = null;
			status = 200;

			byte [] buffer = new byte [1024];
			MemoryStream ms = new MemoryStream ();
			bool gotStatus = false;
			WebHeaderCollection headers = null;

			while (true) {
				int n = stream.Read (buffer, 0, 1024);
				if (n == 0) {
					HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadHeaders");
					return null;
				}
				
				ms.Write (buffer, 0, n);
				int start = 0;
				string str = null;
				headers = new WebHeaderCollection ();
				while (ReadLine (ms.GetBuffer (), ref start, (int) ms.Length, ref str)) {
					if (str == null) {
						if (ms.Length - start > 0) {
							retBuffer = new byte [ms.Length - start];
							Buffer.BlockCopy (ms.GetBuffer (), start, retBuffer, 0, retBuffer.Length);
						}
						return headers;
					}

					if (gotStatus) {
						headers.Add (str);
						continue;
					}

					int spaceidx = str.IndexOf (' ');
					if (spaceidx == -1) {
						HandleError (WebExceptionStatus.ServerProtocolViolation, null, "ReadHeaders2");
						return null;
					}

					status = (int) UInt32.Parse (str.Substring (spaceidx + 1, 3));
					gotStatus = true;
				}
			}
		}