相关疑难解决方法(0)

我在WPF应用程序的主窗口下面有以下XAML,我正在尝试设置d:DataContext下面的设计时间,我可以成功地为我的各种UserControls做,但是当我尝试在窗口...

Error 1 The property 'DataContext' must be in the default namespace or in the element namespace 'http://schemas.microsoft.com/winfx/2006/xaml/presentation'. Line 8 Position 9. C:\dev\bplus\PMT\src\UI\MainWindow.xaml 8 9 UI

<Window x:Class="BenchmarkPlus.PMT.UI.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:UI="clr-namespace:BenchmarkPlus.PMT.UI"
    xmlns:Controls="clr-namespace:BenchmarkPlus.PMT.UI.Controls"
    d:DataContext="{d:DesignInstance Type=UI:MainViewModel, IsDesignTimeCreatable=True}"
    Title="MainWindow" Height="1000" Width="1600" Background="#FF7A7C82">

    <Grid>
        <!-- Content Here -->
    </grid>

</Window>