Update README.md

Author: Rabina4363sf

README.md

@@ -4,7 +4,7 @@
 In [WinForms DataGrid](https://www.syncfusion.com/winforms-ui-controls/datagrid) (SfDataGrid) You can select the entire column in DataGrid using the [SfDataGrid.SelectCells](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectCells_System_Object_Syncfusion_WinForms_DataGrid_GridColumn_System_Object_Syncfusion_WinForms_DataGrid_GridColumn_)
 method. You should set the [SfDataGrid.SelectionUnit](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectionUnit) property as **Cell** or **Any** and the [SfDataGrid.SelectionMode](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_SelectionMode)property as **Extended** or **Multiple** for selecting the entire column. This column selection can be performed when clicking the column header using the [SfDataGrid.CellClick](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html#Syncfusion_WinForms_DataGrid_SfDataGrid_CellClick) event.
 
-C#    
+### C#    
 
 ```C#
 public Form1()
@@ -32,7 +32,7 @@ void sfDataGrid_CellClick(object sender, Syncfusion.WinForms.DataGrid.Events.Cel
 }
 ```
 
-## VB
+### VB
 
 ```VB
 Public Sub New()