Public con1 As New SqlConnection("Data Source=ashii\sqlexpress;Initial Catalog=testing;Integrated Security=SSPI")
 con1.Open()
        Dim cmd As New SqlCommand("select max(pid) from photo ", con1)
        Dim k As New Integer
        k = cmd.ExecuteScalar
        Dim cmd1 As New SqlCommand("select photo from photo where pid='" & k & "'", con1)

<connectionStrings>
		<add name="con" connectionString="Data Source=ashii\\sqlexpress;Initial Catalog=test;Integrated Security=SSPI" providerName="System.Data.SqlClient"/>
	</connectionStrings>

 SqlConnection con1=new SqlConnection (System.Configuration.ConfigurationManager.ConnectionStrings["con"].ConnectionString);