Validating data with Flat File Checker

''' <summary>
''' Represents the collection of row numbers in the file.
''' </summary>
''' <remarks></remarks>
Public Class RecordsCollection
    Implements IEnumerable(Of Integer)
    Private _records As ICollection(Of Integer)

    Public Sub New(ByVal row As Integer)
        _records = New List(Of Integer)
        _records.Add(row)
    End Sub
    Public Sub AddRow(ByVal row As Integer)
        If _records Is Nothing Then _records = New List(Of Integer)
        _records.Add(row)
    End Sub
    Public ReadOnly Property Count() As Integer
        Get
            Return _records.Count
        End Get
    End Property
    Public Function GetEnumerator() As System.Collections.Generic.IEnumerator(Of Integer) Implements System.Collections.Generic.IEnumerable(Of Integer).GetEnumerator
        Return Me._records.GetEnumerator
    End Function

    Public Function GetEnumerator1() As System.Collections.IEnumerator Implements System.Collections.IEnumerable.GetEnumerator
        Return Me._records.GetEnumerator
    End Function
End Class