Check All text

[Tina]

How to change the text of first item "Check all which is generated automatically?

[Princy]

Hello,

Try setting Localization-CheckAllString property.

<telerik:RadComboBox ID="RadComboBox1" runat="server"  CheckBoxes="true" Localization-CheckAllString="Your Text">
</telerik:RadComboBox>

Thanks,
Princy.