in the login page:

```
Session("FirstName") = txtUserName.Text
Response.Redirect("CusRecords.aspx")

```

in the second page:

```
lbl1.Text = Session("FirstName").ToString

```

I used that code an I get this error :

```
Object reference not set to an instance of an object. 
that error refers to lbl1.Text = Session("FirstName").ToString

```

this is the full code of login page:

```
Public Class _Default
Inherits System.Web.UI.Page
Public s As String
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Session.Clear()
    Session.Abandon()
End Sub

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
    Dim con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("RegconnectionString").ConnectionString)
    con.Open()
    Dim userCount As Int32 = GetUserCount(txtUserName.Text)
    Dim paasCount As Int32 = GetPassCount(TxtPassword.Text)

    If userCount > 0 And paasCount > 0 Then
        Session("FirstName") = txtUserName.Text
    Else
        lblErr.Visible = True
    End If
    Response.Redirect("CusRecords.aspx")
End Sub

' Method to check existence 
Public Shared Function GetUserCount(ByVal userName As String) As Int32
    Const sql = "SELECT COUNT(*) FROM Registration where username = @UserName"
    Using con As New SqlConnection(ConfigurationManager.ConnectionStrings("RegconnectionString").ConnectionString)
        Using cmd = New SqlCommand(sql, con)
            cmd.Parameters.AddWithValue("@UserName", userName)
            con.Open()
            Using reader = cmd.ExecuteReader()
                If reader.HasRows Then
                    reader.Read()
                    Dim count As Int32 = reader.GetInt32(0)
                    Return count
                End If
            End Using
        End Using
    End Using
End Function

Public Shared Function GetPassCount(ByVal password As String) As Int32
    Const sql = "SELECT COUNT(*) FROM Registration where password = @Password"
    Using con As New SqlConnection(ConfigurationManager.ConnectionStrings("RegconnectionString").ConnectionString)
        Using cmd = New SqlCommand(sql, con)
            cmd.Parameters.AddWithValue("@Password", password)
            con.Open()
            Using reader = cmd.ExecuteReader()
                If reader.HasRows Then
                    reader.Read()
                    Dim count As Int32 = reader.GetInt32(0)
                    Return count
                End If
            End Using
        End Using
    End Using
End Function

Protected Sub txtUserName_TextChanged(ByVal sender As Object, ByVal e As EventArgs) Handles txtUserName.TextChanged

End Sub
End Class

```

Other Page:

```
Public Class CusRecords
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    If Session("FirstName") IsNot Nothing Then
        lbl1.Text = DirectCast(Session("FirstName"), String)
    Else
        lbl1.Text = "It is empty"
    End If

End Sub

```

End Class