小编tul*_*guy的帖子

我有一个List(字符串).例如:{"C1","C12","C10","C1","C6","C22","C1","C6"}.我正在尝试编写一个函数来给我一个重复列表:列表中的{"C1","C6"}.每个副本只列出一次.我写的功能确实给了我任何回报.我无法弄清楚为什么.任何帮助或替代方法都表示赞赏.仅供参考,我在C#中看到一个非常相似的问题,但我不知道如何将该语法转换为VB.net,因为我还没有达到LINQ的速度.它在这里:如何使用LINQ从列表中获取重复项？

    ''' <summary>
    ''' Given a List(Of String), returns a list of items that are duplicated in the list.
    ''' Each duplicate returned is unique.
    ''' </summary>
    ''' <param name="Set1"></param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetDuplicateItems(ByVal Set1 As List(Of String)) As List(Of String)
        Dim DistinctItems As IEnumerable(Of String)
        'Dim DistinctResults As New List(Of String)
        Dim DuplicateItems As IEnumerable(Of String)
        Dim ItemsToReturn As New List(Of String)

        'Get a set of unique items in the list
        DistinctItems = Set1.Select(Function(x) …