Provide us the Editable WPF RadGridView GroupHeader text value example. So that we can rename the Group Header value by double click on header. Our grid view code is -
<telerik:RadGridView x:Name="Gridview" AutoGenerateColumns="False" ShowGroupPanel="False" ValidatesOnDataErrors="None"
AllowDrop="True" CanUserDeleteRows="True" CanUserInsertRows="True" CanUserSelect="True" CanUserSortGroups="True"
AutoExpandGroups="True" GroupRenderMode="Nested" ItemsSource="{Binding SelectedItems}"
SelectionMode="Extended">
<telerik:RadGridView.GroupHeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<CheckBox x:Name="grpCheckbox" IsThreeState="True">
<i:Interaction.Behaviors>
<behaviors:GroupSelectionBehavior/>
</i:Interaction.Behaviors>
</CheckBox>
<TextBlock Foreground="Black" Text="{Binding Group.Key}" FontWeight="Bold" ForceCursor="True"/>
</StackPanel>
</DataTemplate>
</telerik:RadGridView.GroupHeaderTemplate>