How to Call WCF Class file to Asp.net Application

How to call WCF Class file to Asp.net Application with out creating Class file in Asp.net Application

OssWebService.Service1Client ObjOssWeb = new OssWebService.Service1Client();
OssWebService.UserInfo ObjUserinfo = new OssWebService.UserInfo();


[DataContract]

public class UserInfo{
[DataMember]
public string CenterName { get; set; }[
DataMember]
public string PatientId { get; set; }[
DataMember]
public string PatientName { get; set; }[
DataMember]
public string PhoneNo { get; set; }[
DataMember]
public string Age { get; set; }[
DataMember]
public List<StudyInfo> StudyInfo { get; set; }}