sharpdevel未能加载设计器

我正在将Sharpdevel 5.1.0.5134与.NET 4.5.51209一起使用使桌面应用程序基于Windows.Forms

起初，一切都很好，没有任何警告，设计师正确地显示了表单，我可以轻松地添加组件。

之后，我从包管理控制台正确添加了OxyPlot，并在自定义组件选项卡中找到了新的PlotView组件。

问题是，我无法从"工具"选项卡将组件添加到"表单"中，所以我在源文件中编写了等效语句。

构建过程很顺利，应用程序也很好，但现在我在设计器选项卡中看不到表单，而是收到了以下消息：

Failed to load designer. Check the source code for syntax errors and check if all references are available.
ICSharpCode.FormsDesigner.FormsDesignerLoadException: System.ComponentModel.Design.Serialization.CodeDomSerializerException: Could not find type 'OxyPlot.WindowsForms.PlotView'.  Please make sure that the assembly that contains this type is referenced.  If this type is a part of your development project, make sure that the project has been successfully built using settings for your current platform or Any CPU.
System.ComponentModel.Design.Serialization.CodeDomSerializerException: The variable 'plot1' is either undeclared or was never assigned.
   at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.Error(IDesignerSerializationManager manager, String exceptionText, String helpLink)
   at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeExpression(IDesignerSerializationManager manager, String name, CodeExpression expression)
   at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeExpression(IDesignerSerializationManager manager, String name, CodeExpression expression)
   at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeStatement(IDesignerSerializationManager manager, CodeStatement statement)

   at ICSharpCode.FormsDesigner.FormsDesignerViewContent.LoadDesigner()
   at ICSharpCode.FormsDesigner.FormsDesignerViewContent.LoadAndDisplayDesigner()
   at ICSharpCode.FormsDesigner.FormsDesignerViewContent.LoadInternal(OpenedFile file, Stream stream)
   at ICSharpCode.SharpDevelop.Workbench.AbstractViewContentHandlingLoadErrors.Load(OpenedFile file, Stream stream)

我该如何解决这个问题？