loginscript VB

kan inte direkt hjälpa till, men här är en kod jag använder till login-program
för VB2005:

'Rickythemaniac login system
'This code right here is for the "CREATE ACCOUNT" button.

'Check if the " Account Folder " Exists.
If My.Computer.FileSystem.DirectoryExists("C:\Accounts\") = True Then
'If it does Exist, Do nothing!
Else
' If it does NOT! exist, Create the folder.
MkDir("C:\Accounts")
End If
'Check if THE Account the user is making already Exists.
If My.Computer.FileSystem.DirectoryExists("C:\Accounts\" + TextBox1.Text + "\") = True Then
'If it does! Show an ERROR message.
MsgBox("Error, Account is already in Use", MsgBoxStyle.Critical)
Else
'Check if the Username is Empty
If TextBox1.Text = "" Then
'if it is Empty, Show an Error Message.
MsgBox("Error, Your Account Must have at least 1 Letter in it.", MsgBoxStyle.Information)
Else
'Check if they inputed a Password for their Account.
If TextBox2.Text = "" Then
'If they did Not input a Password, Show an Error message.
MsgBox("Error, Please Input a Password for your Account")
Else
'If they Did everything Correctly, The Account Will be created.
MkDir("C:\Accounts\" + TextBox1.Text)
Dim Username As New System.IO.StreamWriter("C:\Accounts\" + TextBox1.Text + "\" + "Username.txt")
Username.Write(TextBox1.Text)
Username.Close()
Dim Password As New System.IO.StreamWriter("C:\Accounts\" + TextBox1.Text + "\" + "Password.txt")
Password.Write(TextBox2.Text)
Password.Close()
Me.Close()
End If
End If
End If

'If Username is Empty
If TextBox1.Text = "" Then
'Show an Error Message.
MsgBox("Error, You need at least 1 Letter on your Username.")
Else
'Check if the Account you are trying to log into, Exists.
If My.Computer.FileSystem.DirectoryExists("C:\Accounts\" + TextBox1.Text + "\") Then
'Create some Variables that will be used, to read the Username/Password Text Files.
Dim Userread As New System.IO.StreamReader("C:\Accounts\" + TextBox1.Text + "\" + "Username.txt")
Dim Userline As String

Dim Passread As New System.IO.StreamReader("C:\Accounts\" + TextBox1.Text + "\" + "Password.txt")
Dim Passline As String
Do
Passline = TextBox2.Text
Userline = Userread.ReadLine()
Console.WriteLine(Passline)
Console.WriteLine(Userline)
Loop Until Userline Is Nothing

'If Password is Empty
If TextBox2.Text = "" Then
'Give an Error Message.
MsgBox("Error, Please Input Password", MsgBoxStyle.Critical)
Else
'Check if the Password you inputed, Matches the one on the Textfile
'If it does, Congrats.
If Passline = Passread.ReadLine() = True Then
'Show a Welcome Message if the Password is Correct.
MsgBox("Welcome to the System " + TextBox1.Text + "!.")
Else
'Show a message stating Password is INCORRECT
MsgBox("Incorrect Password; Sorry " + TextBox1.Text, MsgBoxStyle.Information)
End If
End If
Else
'If! the Account Does NOT! exist. Show an Error Message.
MsgBox("Error, That Username Does Not Exist.", MsgBoxStyle.Critical)
End If
End If