RadTabControl has bug, by default it make their content controls like (TextBox, ComboBox) shows raedonly non editable in running mode for RadTabItem.
Only CheckBox control can be editable when used with RadTabControl otherwise TextBox and ConboBox are behaving like non editable readonly controls when hosted into RadTabControl
Only CheckBox control can be editable when used with RadTabControl otherwise TextBox and ConboBox are behaving like non editable readonly controls when hosted into RadTabControl