Add DatePicker

[insinfo]

A DatePicker control is used to create a visual DatePicker that let user to pick a date and fire an event on the selection of the date.

 <DatePicker HorizontalAlignment="Left"
                    Margin="10,10,0,0"
                    VerticalAlignment="Top"
                    SelectedDateChanged="DatePicker_SelectedDateChanged"/>

[GeraudFabien]

It should have a step value (day, month, year) to set how much precise we wanted to be (and a default precision). Also we may want to customize it so having many Template would be great. But most of time we may just customise the color... Should have an endDate and startDate, and selectedDate (DateTime?)(Like WinfForm and WPF,...) with dataBinding and CommandParameter for cancel. Question could be: Should it be dependant of a date display control? I thinks it should be two different thinks even if WPF and other use only one control. You can have two control link with dataBinding

Some senario

• When you want a datepicker always display
• You only want to pick a Year or Month or Day (Exclusive OR)
• You just want to display a date or want to use a third party control to pick a date. Or just want to pick and no display (When display is handle by somethinks else [Visibility should be set by dataBinding])...
• You want a DateTimePicker
• Select many Date
• As John skeet say im many conference date are very complex. Sometime state skip date some have even skip year. I don't thinks the basic control should handle this (Impossible without using internet to validate and having a server update) case but the normative case.