.net - "Access of shared member, constant member, enum member or nested type through an instance"

Question

不知道为什么 Visual Studio 发出此警告:

Access of shared member, constant member, enum member or nested type through an instance

我的代码:

Dim a As ApplicationDeployment = deployment.Application.ApplicationDeployment.CurrentDeployment

If System.Deployment.Application.ApplicationDeployment.IsNetworkDeployed Then
    If a.IsNetworkDeployed Then
        ' do something   
    End If
End If

“通过实例”意味着什么？另外，为什么这是一个“警告”？

Answer 1

显示警告是一个设计选项。在 C# 中，使用实例 ( this ) 关键字调用静态时会引发错误。

问题是你应该调用对象来正确描述它是什么。

更多有用信息请访问 MSDN .

Accessing a Shared member through an instance variable can make your code more difficult to understand by obscuring the fact that the member is Shared.

(...)

To correct this error

• Use the name of the class or structure that defines the Shared member to access it, as shown in the following example.

  Public Class testClass
      Public Shared Sub sayHello()
          MsgBox("Hello")
      End Sub
  End Class
  
  Module testModule
      Public Sub Main()
          ' Access a shared method through an instance variable.
          ' This generates a warning.
          Dim tc As New testClass
          tc.sayHello()
  
          ' Access a shared method by using the class name.
          ' This does not generate a warning.
          testClass.sayHello()
      End Sub
  End Module