I have develop a function to add textbox value into data base my function work perfectly .now I am using that table primary key into another table where it declare as a foreign key now i required to return my Id as a output parameter in table1  means( set scope identity)    so that I used this Id into another table as a foreign key please help me how I used this scope identity into a web method
function Insertdata()
           {
               var name  = $('#txtfname').val();
              
                 $.ajax({
                         type: 'POST',
                         url: "Insert.aspx/DataInsertion",
                         contentType: "application/json; charset=utf-8",
                      data: '{name:"' + name + '", Id:"' + output + '"}',
                         async: false,
                         success: function (response) {
                             alert(" Saving the Data.!");
                         },
                       error: function () {
                             alert("Some Error occured While Saving the Data.!");
                           }
                     });
           
           };
 
Web method 
[WebMethod]
    public static string DataInsertion(string name Id output)
    {
        using (var db = new MyEntities())///////this is edmx name
        {
                db.Insertion(
                  Name=name,
                   Id=Output
                   );
            }
        
            return " Data Successfully Saved";
        } 
I read a lot of article but I have no idea to use it.
Please help me