WPF Login Screen Using SQL Database

I am trying to create a log in screen for a WPF application. I was able to create the database and write code without any logical errors, however when I run the application it freezes. When I step through the program it freezes and tells me I have incorrect syntax  adaptor.Fill(dataset, "0") at the closing parentheses. 

Here is my code:

Imports System.Data
Imports System.Data.SqlClient


Class MainWindow


    Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs)
        Dim connection As New SqlClient.SqlConnection
        Dim command As New SqlClient.SqlCommand
        Dim adaptor As New SqlClient.SqlDataAdapter
        Dim dataset As New DataSet

        connection.ConnectionString = "Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Members.mdf;Integrated Security=True"
        command.CommandText = "SELECT * FROM (Users) WHERE Username = '" & nameButton.Text & "'AND Password= '" & pass.Text & "';"
        connection.Open()

        command.Connection = connection

        adaptor.SelectCommand = command
        adaptor.Fill(dataset, "0")

        Dim count = dataset.Tables(0).Rows.Count

        If count > 0 Then
            Me.Hide()
            Dim window1 As New Window1
            Window1.Show()
        Else
            MsgBox("Incorrect Login please check user or psss", MsgBoxStyle.Critical)
            nameButton.Clear()
            pass.Clear()
        End If

    End Sub
End Class