ADO Database VB.Net

Imports System
Imports System.Data
Imports System.Data.SqlClient
    Public Class MainClass
        Public Shared Sub ExecuteScalarExample(ByVal con As IDbConnection)
            Dim com As IDbCommand = con.CreateCommand
            com.CommandType = CommandType.Text
            com.CommandText = "SELECT COUNT(*) FROM HumanResources.Employee;"
            Dim result As Integer = CInt(com.ExecuteScalar)
            Console.WriteLine("Employee count = " & result)
        End Sub
        Public Shared Sub Main()
            Using con As New SqlConnection
                con.ConnectionString = "Data Source=.\sqlexpress;Database=AdventureWorks;Integrated Security=SSPI;"
                con.Open()
                ExecuteScalarExample(con)
                con.Close()
            End Using
        End Sub
    End Class