Hi Mario,
Thank you for contacting syncfusion support.
Please find the following guidelines to work with SfCalendar in xamarin forms.We have prepared sample to show demo on "How to work with calendar control in xamarin". Please find the sample from below and add the reference DLL following format.
Assembles required for SfCalendar:
PCL:
Syncfusion.SfCalendar.XForms.dll
Android:
Syncfusion.SfCalendar.Android.dll
Syncfusion.SfCalendar.XForms.Android.dll
Syncfusion.SfCalendar.XForms.dll
iOS:
Syncfusion.SfCalendar.iOS.dll
Syncfusion.SfCalendar.XForms.iOS.dll
Syncfusion.SfCalendar.XForms.dll
Create an instance of SfCalendarRenderer in FinishedLaunching overridden method of AppDelegate class in iOS Project.
UWP:
Syncfusion.SfInput.UWP.dll
Syncfusion.SfShared.UWP.dll
Syncfusion.SfCalendar.XForms.dll
Syncfusion.SfCalendar.XForms.UWP.dll
Regards,
Rathanakumar S