using WebApplication2.MyWebServiceReference;

MyWebServiceReference.UserCredentials credentials = new UserCredentials();
credentials.username = "uname";
credentials.password = "pwd";

MyWebServiceReference.Options options = new Options ();
options.includeImages = false;
options.maxWidth = 0;
options.maxHeight = 0;
options.maxThumbnailWidth = 0;
options.maxThumbnailHeight = 0;

MyWebServiceReference.Result response = new Result();

MyWebServiceReference.SoapClient client = new SoapClient();
response = client.MyMethod(credentials, options, 100);

var request = System.Net.WebRequest.Create("http://testurl.asmx?op=GetResponse");