检查列表中是否存在项目

    Sub Main()
        Dim People = New List(Of String)({"Bob Barker", "Ricky Bobby", "Jeff Bridges"})
        Console.WriteLine(People.Contains("Rick James"))
        Console.WriteLine(People.Contains("Ricky Bobby"))
        Console.WriteLine(People.Contains("Barker"))
        Console.Read 
    End Sub

产生以下输出：

False
True
False