how to apply for-loop in between string data to create an order in shopify through api : <pre><code>string data = @"  
               {
                ""order"": {  
                 ""line_items"": [
                    {
                    ""variant_id"":" + varientid_arr[0] +@",
                    ""quantity"":" + quantity_arr[0] + @"
                    }
                   ],
                    ""customer"": {
                                  ""id"": 2750996643918
                                  },
                    ""financial_status"": ""pending""
                    }
                 }
                 ";
</code></pre>

<p>in this code i want to iterate line items(varientid_arr[0], quantity_arr[0] ) for creating order with multiple products in shopify.  i want to apply for loop in line items only within string.</p>
