diff --git a/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/razor b/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/razor
index de1b7f3930..308b55c8ca 100644
--- a/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/razor
+++ b/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/razor
@@ -2,7 +2,7 @@
 .EditSettings(edit => { edit.AllowDeleting(true) })
 .Columns(col =>
    {
-    col.Field("TaskID").HeaderText("Task ID").Width(90).TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
+    col.Field("TaskID").HeaderText("Task ID").IsPrimaryKey(true).Width(90).TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
     col.Field("TaskName").HeaderText("Task Name").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Left).Width(180).Add();
     col.Field("Description").HeaderText("Description").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Left).Width(180).Add();
     col.Field("Category").HeaderText("Category ").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Left).Width(180).Add();
@@ -15,7 +15,7 @@
 .EditSettings(edit => edit.AllowAdding(true).AllowEditing(true))
 .Columns(col =>
     {
-        col.Field("TaskID").HeaderText("Task ID").Width(110).TextAlign(TextAlign.Right).Add();
+        col.Field("TaskID").HeaderText("Task ID").IsPrimaryKey(true).Width(110).TextAlign(TextAlign.Right).Add();
         col.Field("TaskName").HeaderText("Task Name").TextAlign(TextAlign.Left).Width(180).Add();
         col.Field("StartDate").HeaderText("Start Date").TextAlign(TextAlign.Right).Format("yMd").Width(90).Add();
         col.Field("Duration").HeaderText("Duration").TextAlign(TextAlign.Right).Width(80).Add();
diff --git a/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/tagHelper b/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/tagHelper
index ab80cd4895..05faba1863 100644
--- a/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/tagHelper
+++ b/ej2-asp-core-mvc/code-snippet/grid/row/drag-drop-tree-grid/tagHelper
@@ -4,7 +4,7 @@
     <e-grid-rowdropsettings targetID="TreeGrid"></e-grid-rowdropsettings>
     <e-grid-editSettings allowDeleting="true"></e-grid-editSettings>                
     <e-grid-columns>
-        <e-grid-column field="TaskID" headerText="Task ID" textAlign="Right" width="90"></e-grid-column>
+        <e-grid-column field="TaskID" headerText="Task ID" textAlign="Right" width="90" isPrimaryKey="true"></e-grid-column>
         <e-grid-column field="TaskName" headerText="Task Name" textAlign="Left" width="180"></e-grid-column>
         <e-grid-column field="Description" headerText="Description" textAlign="Left" width="180"></e-grid-column>
         <e-grid-column field="Category" headerText="Category " textAlign="Left" width="180"></e-grid-column>
@@ -18,7 +18,7 @@
     <e-treegrid-editSettings allowAdding="true" allowEditing="true"></e-treegrid-editSettings>
     <e-treegrid-rowdropsettings targetID="TreeGrid"></e-treegrid-rowdropsettings>
     <e-treegrid-columns>
-        <e-treegrid-column field="TaskID" headerText="Task ID" textAlign="Right" width="90"></e-treegrid-column>
+        <e-treegrid-column field="TaskID" headerText="Task ID" textAlign="Right" width="90" isPrimaryKey="true"></e-treegrid-column>
         <e-treegrid-column field="TaskName" headerText="Task Name" textAlign="Left" width="180"></e-treegrid-column>
         <e-treegrid-column field="StartDate" headerText=" Start Date" textAlign="Right" format="yMd" width="90"></e-treegrid-column>
         <e-treegrid-column field="Duration" headerText="Duration" width="80"></e-treegrid-column>