Added 1 section and 1 note for cases in tickets

Author: eyupyusein

controls/grid/defining-structure/creating-a-radgrid-programmatically.md

@@ -18,6 +18,9 @@ This help article describes two options for creating a **RadGrid** instance dyna
 
 * You can create the **RadGrid** entirely in the code-behind.
 
+>Note
+This article demonstrates how to create and configure the RadGrid control programmatically on the code-behind, given that the data source structure will remain the same. If you want to dynamically change the columns of the grid depending on user selection or some dynamic condition (remove or add columns with different DataFields than the initial loaded structure), this might mess up the ViewState. For this scenario, please refer to the next [Changing the Grid Structure Dynamically on Postback]({%grid/defining-structure/changing-the-grid-structure-dynamically-on-postback%}) article.
+
 When defining the structure of a hierarchical grid (by either method), you should follow these rules:
 
 1. Create the **GridTableView** objects for every detail table. You do not need to create an object for the **MasterTableView** of the grid, as this is created automatically when the **RadGrid** itself is created.
@@ -55,19 +58,19 @@ To define the structure of a **RadGrid** control that is declared in the ASPX pa
 
 ````ASP.NET
 <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server" />
-<asp:SqlDataSource ID="SqlDataSource1" 
+<asp:SqlDataSource ID="SqlDataSource1"
       ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
       ProviderName="System.Data.SqlClient"
       SelectCommand="SELECT * FROM Customers" runat="server"></asp:SqlDataSource>
-<asp:SqlDataSource ID="SqlDataSource2" 
+<asp:SqlDataSource ID="SqlDataSource2"
       ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
       ProviderName="System.Data.SqlClient"
       SelectCommand="SELECT * FROM Orders Where CustomerID = @CustomerID" runat="server">
       <SelectParameters>
             <asp:SessionParameter Name="CustomerID" SessionField="CustomerID" Type="string" />
       </SelectParameters>
 </asp:SqlDataSource>
-<asp:SqlDataSource ID="SqlDataSource3" 
+<asp:SqlDataSource ID="SqlDataSource3"
       ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
       ProviderName="System.Data.SqlClient"
       SelectCommand="SELECT * FROM [Order Details] where OrderID = @OrderID" runat="server">
@@ -245,11 +248,11 @@ When generating a grid in the **Page_Init** event handler, grid columns should b
 
 ````ASP.NET
 <asp:PlaceHolder ID="PlaceHolder1" runat="server" />
-<asp:SqlDataSource ID="SqlDataSource4" 
+<asp:SqlDataSource ID="SqlDataSource4"
       ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
       ProviderName="System.Data.SqlClient"
       SelectCommand="SELECT * FROM Customers" runat="server"></asp:SqlDataSource>
-<asp:SqlDataSource ID="SqlDataSource5" 
+<asp:SqlDataSource ID="SqlDataSource5"
       ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
       ProviderName="System.Data.SqlClient"
       SelectCommand="SELECT * FROM Orders Where CustomerID = @CustomerID" runat="server">

controls/grid/hierarchical-grid-types-and-load-modes/what-you-should-know.md

@@ -38,6 +38,15 @@ The new expand-all functionality supports all hierarchy load modes.
 
 When you have grouping and hierarchy combined in a common table view, the visibility of the hierarchy expand-all button depends on whether the expand-all button for the last group level is expanded/visible.
 
+## Controlling Expanded State
+
+By default, the items in a hierarchical RadGrid are collapsed. In order to expand them automatically, you can use the **HierarchyDefaultExpanded** property. If the hierarchy structure contains several levels, the property should be set for every  GridTableView instance separately.
+````ASP.NET
+<MasterTableView HierarchyDefaultExpanded="true">
+````
+
+ Since Q3 2013 version, RadGrid also provides the convenient  **RetainExpandStateOnRebind** property. When you enable it, the expanded state of the parent items will be preserved automatically on rebinding actions like Paging, Editing, etc.
+
 ## See Also
 
  * [Hierarchical data-binding using declarative relations]({%slug grid/hierarchical-grid-types-and-load-modes/hierarchical-data-binding-using-declarative-relations%})