How to pass a Datatable from one class A to another Class B

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C#

hi all..

I'm trying pass a DataTable from Class A to Class B [Here I'm using 3-Tier architecture class b is in class library] using properties my code goes like this.


1)public DataTable TYPE_TYRE()

In the above method(1) I'm using to bind the grid to DataTable (working fine)

Case1:-
2)

protected void Test_Click(object sender, EventArgs e)

   {
         Vehicle_Bal ObjB = new Vehicle_Bal();
         ObjB.DtTyre = TYPE_TYRE();
         ObjB.BlTest();

    }

In (2) Button Click I'm Calling (1) assigning it to property from Class A to Class B everything is working fine[Case1 when testing] i could get data in to DataTable property in Vehicle_Bal i.e, class B

##But the problem is occurs when My code is like this in my method.

Case2:-
3)

public void CreateVehicle()
    {
             
        Vehicle_Bal ObjB = new Vehicle_Bal();

        ObjB .PurchaseDt = Convert.ToDateTime(txtPurchaseDate.Text);
        ObjB .WarrentyDt = Convert.ToDateTime(txtWarrentyDate.Text);
        ObjB .MIsc = txtMisc.Text;
        ObjB .VStatus = ddlVStatus.SelectedItem.Text;
       
        (@Mistake)ObjVehicle .DtTyre = TYPE_TYRE();-----------(1)
        (*)ObjB .DtTyre = TYPE_TYRE();-----------(1)

3)----

ObjB .BlCreateVeh();
      }

4) )

protected void btnsave_Click(object sender, EventArgs e)
      {
           CreateVehicle()
      }

In case2 to Upto (*) its is working good, when Im calling (3) i.e method from Class B and Passing the DataTable to Class B I'm not getting any Data

Please any one find out the problem and give me solution to it.