我无法在Visual Studio 2008中它是由我的朋友在C＃开发打开我的项目。它显示了这个错误：

I'm unable to open my project in Visual Studio 2008. It was developed in C# by my friend. It is showing the this error:

  "Could not find type 'LibrarySystem.ctrlSeparator'.
  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. "

此外

  "The variable 'ctrlSeparator1' is either undeclared or was never assigned. "

我该如何纠正这个问题？

How do I rectify this problem?

推荐答案

与所有尊重......的错误消息告诉你，你需要知道的一切......

With all respect...the error message tells you everything you need to know...

它试图加载控件，它不存在。因此，无论你的朋友没有给你的整个项目，或者他用了一个第三方的分量，你没有。

It's trying to load a control, which does not exist. So either your friend didn't give you the whole project, or he used a Third-party-Component which you don't have.