Getting Compilation error while using FontSize tag inside the Entry control in Xamarin.Forms

We have used the following code in our XAML page and we are getting XAML compilation error with "No property, bindable property, or event found for 'FontSize' while using the following code"

**Code example: **

             <Entry FontSize="{x:Static constants:AppConstants.FontSmall}" Text="Enter the Value"/>

Thanks in Advance.