MainWindow.xaml

<Window x:Class="SchedulerBindToObservableCollectionWpf.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxsch="http://schemas.devexpress.com/winfx/2008/xaml/scheduler"
        xmlns:local="clr-namespace:SchedulerBindToObservableCollectionWpf"
        Title="MainWindow" Height="600" Width="800">

    <Window.DataContext>
        <local:SchedulerViewModel/>
    </Window.DataContext>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <dxsch:SchedulerControl Name="schedulerControl1" GroupType="Resource" Grid.ColumnSpan="3">
            <dxsch:SchedulerControl.Storage>
                <dxsch:SchedulerStorage>
                    <dxsch:SchedulerStorage.AppointmentStorage>
                        <dxsch:AppointmentStorage DataSource="{Binding Appointments}" ResourceSharing="True">
                            <dxsch:AppointmentStorage.Mappings>
                                <dxsch:AppointmentMapping
                                    Start="StartTime"
                                    End="EndTime"
                                    Subject="Subject"
                                    Description="Description"
                                    Location="Location"
                                    AllDay="AllDay"
                                    Label="Label"
                                    Status="Status"
                                    Type="EventType"
                                    RecurrenceInfo="RecurrenceInfo"
                                    ReminderInfo="ReminderInfo"
                                    ResourceId="ResourceId"/>
                            </dxsch:AppointmentStorage.Mappings>
                            <dxsch:AppointmentStorage.CustomFieldMappings>
                                <dxsch:SchedulerCustomFieldMapping Member="Price" Name="cfPrice" ValueType="Decimal"/>
                            </dxsch:AppointmentStorage.CustomFieldMappings>
                        </dxsch:AppointmentStorage>
                    </dxsch:SchedulerStorage.AppointmentStorage>
                    <dxsch:SchedulerStorage.ResourceStorage>
                        <dxsch:ResourceStorage DataSource="{Binding Resources}">
                            <dxsch:ResourceStorage.Mappings>
                                <dxsch:ResourceMapping
                                    Id="Id"
                                    Caption="Name"
                                    Color="Color"/>
                            </dxsch:ResourceStorage.Mappings>
                        </dxsch:ResourceStorage>
                    </dxsch:SchedulerStorage.ResourceStorage>
                </dxsch:SchedulerStorage>
            </dxsch:SchedulerControl.Storage>
        </dxsch:SchedulerControl>
        
        <Label Grid.Row="1" Content="Test methods:" HorizontalAlignment="Center" FontSize="20" Foreground="DarkBlue"/>
        <Button Grid.Row="1" Grid.Column="1" Content="Add New Appointment" Command="{Binding AddNewAppointmentCommand}" />
        <Button Grid.Row="1" Grid.Column="2" Content="Get Source Object" Command="{Binding GetSourceObjectCommand}" CommandParameter="{Binding ElementName=schedulerControl1, Path=Storage}" />
    </Grid>
</Window>