Sqlite insert data in list

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forms

SQLite

Xamarin

Hi
i am working a LocalDb Application in Xamarin Form.
My Requirement is to save Data Locally using SQLite DB.
i have created successfully Save interface and method. Data is coming from the xamarin forms successfully but only one data is storing in the class object that is

Interface

bool SaveNRCMaterialList(AddMaterialDataIntoLocalDb obj);

Method

public bool SaveNRCMaterialList(AddMaterialDataIntoLocalDb obj)
      {
          GetSqlConnection();
          bool res = false;
          try
          {

              con.Insert(obj);
              res = true;
          }
          catch (Exception ex)
          {
              res = false;
          }
          return res;
      }

Friends i just want to save list data inside the

con.Insert(obj);

can i have tried so many time please guid me how to insert here using list or how we can convert this into a list form

What I have tried:

if (btnsave.Text == "Save")
          {

              AddMaterialDataIntoLocalDb obj = new AddMaterialDataIntoLocalDb();


                  obj.NPD_OFF_S_NO = txtOffSerialNumber.Text;
                  obj.NPD_ALTERNATE_PART_NO = txtNPD_ALTERNATE_PART_NO.Text;


              //obj.NPD_ON_S_NO = txtOffSerialNumber.Text;
              //obj.NPD_ALTERNATE_PART_NO = txtNPD_ALTERNATE_PART_NO.Text;
              //obj.NPD_REQ_ON_PART_NO = txtOnPArtNumbers.Text;
              //obj.NPD_Part_Type = txtPartType.Text;

              //obj.NPD_DESC = txtdesc.Text;
              //obj.NPD_IPC_REF = txtNPD_IPC_REFERENCE.Text;
              //obj.NPD_POS = txtEnterPOS.Text;
              //obj.NPD_REQ_QTY =txtNPD_REQ_QTY.Text;
              //obj.NPD_NEED_DATE = DateTime.Now;
              //obj.NPD_BATCH_REL_NOTE = txtNPD_BATCH_REL_NOTE.Text;
              //obj.NPD_USED_QTY = txtNPD_USED_QTY.Text;
              //obj.NPD_UOM = txtNPD_UOM.Text;
              //obj.NDP_Updated_By = txtNDP_Updated_By.Text;
              //obj.NPD_Inward = txtNPD_Inward.Text;
              //btnsave.Text = "Update";



            bool res=  DependencyService.Get<ISQLiteNRC>().SaveNRCMaterialList(obj);

              try
              {
                  Navigation.PushAsync(new NRCMeterialList());
              }
              catch(Exception ex)
              {

                  DisplayAlert("message", "Save failed", "Ok");
              }
          }