在VB.NET中使用模块被认为是不好的做法？(Are using modules in VB.NET considered bad practice?)

 Centro是正确的，一个模块（或带有共享成员的不可继承类）与C＃静态类最接近 。 所以从技术上讲，没有什么是错的，因为它只是VB创建这种类的方法之一。 例如，您不能在VB中说Public Shared Class Settings ，因为您无法将Shared关键字放在类上。 
 
 就其本身而言，如果某个特定的情况需要一个模块，我不会称之为不好的做法，否则一个模块（或其他静态类的等价物）可能不是您想要的具有松散耦合，可测试代码的设计选择。 此外，尽管带有共享成员的不可继承类比描述模块更具描述性，但至少有一种情况需要使用模块来代替。 
 
 你什么时候需要在VB.Net中使用模块？ 如果你想利用扩展方法 ，那么这是你唯一的选择，因为如前所述，你不能在VB.Net中创建一个共享（静态）类，你也不能在不可继承类上使用扩展。 您必须按如下方式使用模块： 
 
Imports System.Runtime.CompilerServices

Public Module StringExtensions
    <Extension()> _
    Public Function Remove( _
                        ByVal input As String, _
                        ByVal subStrings As String()) As String
        Return String.Join("", input.Split(subStrings, StringSplitOptions.None)).Trim()
    End Function
End Module
 
 在C＃中，您不能使用模块，并且必须使用静态类，如下所示： 
 
public static class StringExtensions
{
    public string Remove(this string input, string[] subStrings)
    {
        return string.Join("", input.Split(subStrings, StringSplitOptions.None)).Trim();
    }
}   

Centro is right that a Module (or a NotInheritable Class with Shared members) is the closest equivalent to a C# static class. So technically, nothing is wrong with it as it's just one of VB's ways of creating this type of class. For example, you cannot say Public Shared Class Settings in VB as you cannot put the Shared keyword on a class. 
 
On its own I wouldn't call it bad practice if a specific circumstance calls for a Module, but otherwise a Module (or other static class equivalents) likely is not the design choice you want for having loosely coupled, testable code. Additionally, while a NotInheritable Class with Shared members is more descriptive than just saying Module, there is at least one circumstance where a Module must be used instead.
 
When would you need to use Modules in VB.Net? If you want to take advantage of extension methods, then it's your only option since as mentioned, you cannot create a shared (static) class in VB.Net, neither can you use extensions on NotInheritable Classes. You must use a module as follows:
 
Imports System.Runtime.CompilerServices

Public Module StringExtensions
    <Extension()> _
    Public Function Remove( _
                        ByVal input As String, _
                        ByVal subStrings As String()) As String
        Return String.Join("", input.Split(subStrings, StringSplitOptions.None)).Trim()
    End Function
End Module
 
In C# you can't use modules and must use static classes as follows:
 
public static class StringExtensions
{
    public string Remove(this string input, string[] subStrings)
    {
        return string.Join("", input.Split(subStrings, StringSplitOptions.None)).Trim();
    }
}