[2008] best way to accomplish this?

I was trying to make a way to send text messages through email. Turns out most providers offer a SMStoEmail.

I have created a class to help me do it.
I want to be sure that i've used the correct way (I've used dictionary).

I needed one dictionary to keep,
[number], [provider] and this is accessed from the UI (or whatever creates the object).

I also have another [provider], [provideremail] dictionary which stores the providers and there respective email.

This way seemed useful since I can check if a provider exists easily, and keep track of emails. I then match the provider with they number, and send the email.

Again, I want to know if using the dictionary is the best way to accomplish this..
Here is my class

Imports System.IO
Imports System.Text.RegularExpressions

vb Code:

Public Class SMS
    Private _numberLength As Integer
    Private _ListOfNumbers As New Dictionary(Of String, String)
    Private _ListOfProviders As New Dictionary(Of String, String)
    Private _phonenumber As String
    Private _FilePath As String
    Private __defaultprovider As String
 
#Region "Properties"
 
    Private Property PhoneNumber() As String
        Get
            Return _phonenumber
        End Get
        Set(ByVal value As String)
            _phonenumber = value
        End Set
    End Property
 
 
    Private Property Length() As Integer
        Get
            Return _numberLength
        End Get
        Set(ByVal value As Integer)
            _numberLength = value
        End Set
    End Property
    
    Private Property ListOfProviders() As Dictionary(Of String, String)
        Get
            Return _ListOfProviders
        End Get
        Set(ByVal value As Dictionary(Of String, String))
            _ListOfProviders = value
        End Set
    End Property
 
 
    Private Property ListOfNumbers() As Dictionary(Of String, String)
        Get
            Return _ListOfNumbers
        End Get
        Set(ByVal value As Dictionary(Of String, String))
            _ListOfNumbers = value
        End Set
    End Property
 
 
    Private Property DefaultProvidor() As String
        Get
            Return __defaultprovider
        End Get
        Set(ByVal value As String)
            __defaultprovider = value
        End Set
    End Property
 
    Public Property FilePath() As String
        Get
            Return _FilePath
        End Get
        Set(ByVal value As String)
            _FilePath = value
        End Set
    End Property
#End Region
#Region "Constructors"
 
    Public Sub New(ByVal df As String)
        Try
            If Not String.IsNullOrEmpty(df) Then
                DefaultProvidor = df
                Length = 10
                LoadProviders()
            Else
                Throw New Exception
            End If
        Catch ex As Exception
            'log your error
            Console.WriteLine(ex.Message)
        End Try
 
    End Sub
    Public Sub New(ByVal df As String, ByVal l As Integer)
        Try
            If Not String.IsNullOrEmpty(df) Or Integer.Parse(l) Then
                DefaultProvidor = df
                Length = l
                LoadProviders()
            Else
                Throw New Exception("Default Provider must be a string")
            End If
        Catch ex As Exception
            'handle your exception here.
            Console.WriteLine(ex.Message)
        End Try
       
    End Sub
 
    Public Sub New(ByVal df As String, ByVal fp As String)
        If Not String.IsNullOrEmpty(fp) Or Not String.IsNullOrEmpty(fp) Then
            DefaultProvidor = df
            Length = 10
            FilePath = fp
        Else
            Throw New Exception("Your filepath/Defaultprovider is invalid")
        End If
    End Sub
#End Region
#Region "Public Functions"
 
 
    'public functions.
    Public Sub AddSingle(ByVal number As String, ByVal provider As String)
        PhoneNumber = number
        If CheckNumber() Then
            If DoesProviderExist(provider) Then
                ListOfNumbers.Add(PhoneNumber, provider)
            End If
        End If
    End Sub
 
    Public Sub AddSingle(ByVal number As String) 'uses the default provider
        PhoneNumber = number
        If CheckNumber() Then
            ListOfNumbers.Add(PhoneNumber, DefaultProvidor)
        End If
    End Sub
 
    Public Sub Delete(ByVal number As String)
        ListOfNumbers.Remove(number)
    End Sub
 
    Public Sub SendAll()
 
        Dim fullEmail As String = String.Empty
 
        For Each num In ListOfNumbers
            Dim pro As String = String.Empty
            If ListOfProviders.TryGetValue(num.Value, pro) Then
                Dim temp As String = pro.Replace("number", num.Key)
                SendEmail(temp)
            Else
                Console.WriteLine("Sendall failed")
            End If
        Next
    End Sub
#End Region
#Region "Private functions"
 
 
    Private Sub SendEmail(ByVal email As String)
        'send your email here.
        Console.WriteLine(email)
    End Sub
 
    Private Sub LoadProviders()
        Dim reader As New IO.StreamReader(FilePath) ' create new streamreader
        Do Until reader.EndOfStream
            Dim line As String = reader.ReadLine 'read single line
            Dim proArray() As String = line.Split(",") 'split the line
            ListOfProviders.Add(proArray(0).Trim, proArray(1).Trim) 'store both parts into dictionary
        Loop
        reader.Close()
    End Sub
    'this method parses the number, and removes any dashses.
    Private Function CheckNumber() As Boolean
        Dim ph As String = PhoneNumber
        'remove one or zero.
        If ph.StartsWith(0) Or ph.StartsWith(1) Then
            ph = ph.Remove(0, 1)
        End If
 
 
        'remove all dashes and check for length
        ph = ph.Replace("-", String.Empty)
        If ph.Length <> Length Or ph.Length + 1 <> Length + 1 Then
            Console.WriteLine("Length didnt match")
            Return False
        End If
 
        ' Check a (USA style) telephone number
        '1-800-201-1929 (true)
        '800-201-1929 (true)
        '201-1929 (false)
        Dim myRegex As New Regex( _
           "^1?\s*-?\s*(\d{3}|\(\s*\d{3}\s*\))\s*-?\s*\d{3}\s*-?\s*\d{4}$")
 
        If Not myRegex.IsMatch(ph) Then
            Console.WriteLine("not in right format")
            Return False
        End If
 
        PhoneNumber = ph
        Console.WriteLine(PhoneNumber)
        Return True
    End Function
 
 
    Private Function DoesProviderExist(ByVal name As String) As Boolean
        If ListOfProviders.ContainsKey(name.Trim) Then
            Console.WriteLine("provider exists: " & name)
 
            Return True
        Else
            Console.WriteLine("provider don't exist")
            Return False
        End If
    End Function
#End Region
End Class