MainWindow.xaml

<dx:ThemedWindow
    x:Class="CustomMvvmFormWithRecurrenceExample.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxsch="http://schemas.devexpress.com/winfx/2008/xaml/scheduling"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
    xmlns:local="clr-namespace:CustomMvvmFormWithRecurrenceExample"
    Height="600"
    Width="850"
    DataContext="{dxmvvm:ViewModelSource local:MainViewModel}"
    Title="MainWindow">

    <Grid>
        <dxsch:SchedulerControl 
            x:Name="Scheduler"
            ActiveViewIndex="0"
            GroupType="Resource">
            <dxsch:DayView
                x:Name="dayView"
                DayCount="3"
                ResourcesPerPage="3"
                ShowAllDayArea="False"
                ShowWorkTimeOnly="True" />
            <dxsch:WorkWeekView
                x:Name="workWeekView"
                ResourcesPerPage="3"
                ShowAllDayArea="False"
                ShowWorkTimeOnly="True" />
            <dxsch:WeekView
                x:Name="weekView"
                ResourcesPerPage="3"
                ShowAllDayArea="False"
                ShowWorkTimeOnly="True" />
            <dxsch:MonthView/>
            <!--region #WindowTypes-->
            <dxsch:SchedulerControl.OptionsWindows>
                <dxsch:OptionsWindows AppointmentWindowType="{x:Type local:HospitalAppointmentWindow}" RecurrenceWindowType="{x:Type local:HospitalRecurrenceWindow}" />
            </dxsch:SchedulerControl.OptionsWindows>
            <!--endregion #WindowTypes-->
            <!--region #EventToCommand-->
            <dxmvvm:Interaction.Behaviors>
                <dxmvvm:EventToCommand EventName="InitNewAppointment" Command="{Binding InitNewAppointmentCommand}">
                    <dxmvvm:EventToCommand.EventArgsConverter>
                        <local:NewAppointmentInitConverter/>
                    </dxmvvm:EventToCommand.EventArgsConverter>
                </dxmvvm:EventToCommand>
            </dxmvvm:Interaction.Behaviors>
            <!--endregion #EventToCommand-->
            <dxsch:SchedulerControl.DataSource>
                <dxsch:DataSource AppointmentsSource="{Binding Appointments}" ResourcesSource="{Binding Doctors}">
                    <dxsch:DataSource.AppointmentMappings>
                        <dxsch:AppointmentMappings
                            AllDay="AllDay"
                            Id="Id"
                            End="EndTime"
                            Location="Location"
                            RecurrenceInfo="RecurrenceInfo"
                            Reminder="ReminderInfo"
                            ResourceId="DoctorId"
                            Start="StartTime"
                            Subject="PatientName"
                            Type="Type">
                            <dxsch:CustomFieldMapping Mapping="InsuranceNumber" Name="InsuranceNumber" />
                            <dxsch:CustomFieldMapping Mapping="FirstVisit" Name="FirstVisit" />
                            <dxsch:CustomFieldMapping Mapping="Notes" Name="Notes" />
                        </dxsch:AppointmentMappings>
                    </dxsch:DataSource.AppointmentMappings>
                    <dxsch:DataSource.ResourceMappings>
                        <dxsch:ResourceMappings Caption="Name" Id="Id" />
                    </dxsch:DataSource.ResourceMappings>
                </dxsch:DataSource>
            </dxsch:SchedulerControl.DataSource>
        </dxsch:SchedulerControl>
    </Grid>

</dx:ThemedWindow>