无法在 UWP 应用程序中解析 System.Runtime 的范围

Question

我正在构建一个 UWP 应用程序。我正在编写一个控件，使 Textbox 在单击之前看起来像一个文本块。所以，我从 Textbox class 继承了我的 class 但我遇到了一些问题。这是我通过一些参考编写的代码。

public class EditableTextBox:TextBox
    {
        public EditableTextBox()
        {
            this.BorderBrush = new SolidColorBrush(Colors.Black);
        }

        protected override void OnTapped(TappedRoutedEventArgs e)
        {
            this.IsReadOnly = false;
            SetEditingStyle();
            base.OnTapped(e);
        }

        protected override void OnDoubleTapped(DoubleTappedRoutedEventArgs e)
        {
            this.IsReadOnly = false;
            SetEditingStyle();
            base.OnDoubleTapped(e);
        }

        protected override void OnLostFocus(RoutedEventArgs e)
        {
            this.IsReadOnly = true;
            SetReadonlyStyle();
            base.OnLostFocus(e);
        }

        public void SetReadonlyStyle()
        {
            this.BorderBrush.Opacity = 0;
            this.Background.Opacity = 0;
        }

        public void SetEditingStyle()
        {
            this.BorderBrush.Opacity = 1;
            this.Background.Opacity = 1;
        }
    }

编译器让我参考System.Runtime如下图：

The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=0.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

Predefined type 'System.Void' is not defined or imported

The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=0.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

我该怎么做才能解决这个问题？

Answer 1

右键单击解决方案资源管理器中的解决方案 window 和 select 'Restore NuGet packages for solution' 选项。

这将为您的项目下载所需的 NuGet 包。

无法在 UWP 应用程序中解析 System.Runtime 的范围

Unable to resolve scope of System.Runtime in UWP App

c#

xaml

custom-controls

uwp