Validating data with Flat File Checker

Imports System.Threading
''' <summary>
''' Provides the interface for data rules.
''' </summary>
''' <remarks></remarks>
Public Interface IDataRule
    ReadOnly Property Type() As DataRuleType
    ''' <summary>
    ''' Runs validation of the data rule for all cells in the parent column.
    ''' </summary>
    ''' <param name="wait"></param>
    ''' <returns>true if process completed without errors.</returns>
    ''' <remarks></remarks>
    Function RunChecks(ByVal wait As AutoResetEvent) As Boolean
    ''' <summary>
    ''' Evaluates the value in the parent column at specific row.
    ''' </summary>
    ''' <param name="row">Number(zero-based) of the row in which value will be validated.</param>
    ''' <returns>true if value is valid.</returns>
    ''' <remarks></remarks>
    Function Evaluate(ByVal row As Integer) As Boolean
    ''' <summary>
    ''' Gets the column to wich the rule belongs to.
    ''' </summary>
    ''' <value></value>
    ''' <returns>Column instance.</returns>
    ''' <remarks></remarks>
    Property Column() As DataColumn
    ''' <summary>
    ''' Gest or sets an action that should be done when a value is invalid.
    ''' </summary>
    ''' <value></value>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Property Action() As RowAction
    ReadOnly Property ErrorMessage() As String
    ''' <summary>
    ''' Gets or sets a value indicating whether this rule is a part of a where clause.
    ''' </summary>
    ''' <value></value>
    ''' <returns>true if the rule is a part of the where clause.</returns>
    ''' <remarks></remarks>
    Property InWhere() As Boolean
    ''' <summary>
    ''' Gest the rule that contains this rule.
    ''' </summary>
    ''' <value></value>
    ''' <returns>rule that contains this rule.</returns>
    ''' <remarks></remarks>
    Property Parent() As IDataRule
End Interface