true if the validation control can be rendered for an "uplevel" browser; otherwise, false.
The BaseCompareValidator.DetermineRenderUplevel method is a helper function used primarily by the BaseValidator.RenderUplevel property to determine whether the client's browser supports "uplevel" rendering (rendering on a newer browser). The System.Web.UI.WebControls.BaseCompareValidator class overrides this method to return false if the current culture uses a non-Gregorian calendar.
This method is used primarily by control developers.