android客户端通过webServcie与服务器交互，如何保持Session

	private static SoapObject getCommon(SoapObject request) {
		// 鑾峰緱搴忓垪鍖栫殑Envelop
		SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
				SoapEnvelope.VER11);
		envelope.bodyOut = request;
		envelope.dotNet = true;
		(new MarshalBase64()).register(envelope); // Android浼犺緭瀵硅薄
		HttpTransportSE ht = new HttpTransportSE(serviceURL);
		try {
			List<HeaderProperty> hl = null;
			if (headerValue != null && !"".equals(headerValue)) {
				hl = new ArrayList<HeaderProperty>();
				HeaderProperty headerPropertyObj = new HeaderProperty("cookie",
						headerValue);
				hl.add(headerPropertyObj);
			}	
			List headerList = ht.call(serviceNameSpace + "sayHello", envelope,
					hl);
			for (Object header : headerList) {
				HeaderProperty headerProperty = (HeaderProperty) header;
				String headerKey = headerProperty.getKey();
				if("Set-Cookie".equals(headerKey))
				{
					headerValue = headerProperty.getValue();
				}
				String value = headerProperty.getValue();
				System.out.println(headerKey + " : " + value);
			}
			if (envelope.getResponse() != null) {
				return (SoapObject) envelope.bodyIn;
			}
		} catch (IOException e) {
			e.printStackTrace();

		} catch (XmlPullParserException e) {
			e.printStackTrace();
		}
		return null;
	}

服务端用.net写的接口好像是没有Set-Cookie这一项的，本人对C#也不了解，不知这种情况下改如何做，希望知道的朋友告之，非常感谢！