严重性代码描述项目项目文件行状态已取消错误XLS 0414找不到类型'ViewModels'。请检查是否没有缺少对程序集的引用，以及是否已编译所有引用的程序集。TravelAppSample C：\TravelAppSample-masterTravelAppSampleViewsTravelPage.xaml 8我收到此错误我已经检查了源目录中的文件夹，并且在本地位置找到了该文件。

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:TravelAppSample" 
             x:Class="TravelAppSample.Views.TravelPage">

    <ContentPage.BindingContext >
        <local:ViewModels.TravelViewModel />
    </ContentPage.BindingContext >

    <ContentPage.Content> 
        <StackLayout>

            <!-- Principal-->
            <StackLayout BackgroundColor="#f8b732" HeightRequest="350">
                <!-- Main image-->
                <Image Source="PrincipalImage" HorizontalOptions="Center" VerticalOptions="Center" Margin="0,30,0,0"/>
                <!-- Place name & travel date-->
                <Label Margin="30,0,0,0">
                    <Label.FormattedText>
                                <FormattedString>
                                   <Span Text="Cuzco &#10;" FontSize="28" FontAttributes="Bold" ForegroundColor="White" />
                                   <Span Text="20 Marzo - 27 Marzo" FontSize="17" ForegroundColor="White" />
                                </FormattedString>
                     </Label.FormattedText>
                </Label> 
                <Frame CornerRadius="35" Margin="0,0,0,-20" BackgroundColor="#f8b732" HasShadow="False" HeightRequest="25" VerticalOptions="EndAndExpand"/>
            </StackLayout>

            <!-- Days-->
            <ScrollView VerticalScrollBarVisibility="Never"
                        VerticalOptions="Start" 
                        HeightRequest="85"  
                        Orientation ="Horizontal">
                    <StackLayout x:Name="DaysBlock" 
                                 Orientation="Horizontal"
                                 HorizontalOptions="FillAndExpand"
                                 Padding="20,15,20,5">
                    </StackLayout>
            </ScrollView>

          <!-- Schedule-->
          <StackLayout BackgroundColor="#f8f9fb">
               <CollectionView ItemsSource="{Binding travelSchedule}"
                               SelectedItems="{Binding commmantest}"
                               VerticalOptions="Start">
                     <CollectionView.ItemTemplate>
                           <DataTemplate>  
                                  <StackLayout Orientation="Horizontal" Padding="30,10">

                                      <!-- Time-->
                                      <Label Text="{Binding Time}" FontAttributes="Bold" FontSize="18"/>

                                      <!-- Travel indicator-->
                                      <StackLayout Orientation="Vertical"> 
                                        <Image   Source="{Binding TransportType}" HeightRequest="30"/>  
                                        <BoxView VerticalOptions="FillAndExpand" WidthRequest="2" Color="{Binding TransportColor}" HeightRequest="70" Margin="20,0"/>
                                      </StackLayout>

                                      <!-- Place to go-->
                                       <Image Source="{Binding Picture}" HeightRequest="80" WidthRequest="90" VerticalOptions="Start" />

                                      <!-- Place description-->
                                       <StackLayout>
                                            <Label Text="{Binding Name}" FontAttributes="Bold" FontSize="16" />
                                            <Label Text="{Binding Adress1}" FontSize="15" TextColor="Silver"/>
                                            <Label Text="{Binding Adress2}" FontSize="15" TextColor="Silver"/>
                                       </StackLayout>

                               </StackLayout>
                          </DataTemplate>
                     </CollectionView.ItemTemplate>
               </CollectionView>
          </StackLayout>
        </StackLayout> 
    </ContentPage.Content>
</ContentPage>[![enter image description here](https://i.stack.imgur.com/LhiUE.png)](https://i.stack.imgur.com/LhiUE.png)

这是错误的图像：