C#调用Web接口数据量大还没接收完数据就提示超时怎么办？

//获取接口数据    
 string bool_json = or.TeamOrderForTicketsColorFul(ParkCode.Rows[0]["SCODE"].ToString().Trim(), Newjson_team, PublicSign.Base64Encode(PublicSign.MD5(ParkCode.Rows[0]["SCODE"].ToString().Trim() + ParkCode.Rows[0]["SPARKFLAG"].ToString().Trim() + Newjson_team)));//接收数据
  [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/TeamOrderForTicketsColorFul", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)] public string TeamOrderForTicketsColorFul(string parkCode, string dataStr, string sign) {
            object[] results = this.Invoke("TeamOrderForTicketsColorFul", new object[] {
                        parkCode,
                        dataStr,
                        sign});
          
            return ((string)(results[0]));
        }