Why List(Of T) doesn't have Count()?

Question

Public Class MyList
    Inherits List(Of MyObject)

    Public ReadOnly Property SelectedCount() As Integer
        Get
            Return Me.Count(Function(obj) obj.IsS         


        

Answer 1

Call the method without the extension method syntax:

Public Class MyList
    Inherits List(Of MyObject)

    Public ReadOnly Property SelectedCount() As Integer
        Get
            Return Enumerable.Count(Me, Function(obj) obj.IsSelected)
        End Get
    End Property
End Class

Make sure you have added an import to System.Linq.