Switch between Forms based on condition using C# in Windows Forms Application

Hi everyone I have 3 forms: form1,form2 and form3. Default form is form1 I want to switch form2 and form3 like above conditon Thank for reading

namespace EmailChecker
{
    public partial class Form1 : Form
    {
        string connectionString;
        string ID;
        public Form1()
        {
            InitializeComponent();
            connectionString = @"Data Source = C:\Users\Administrator\Downloads\New folder\EmailChecker.db; Version=3";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            using (SQLiteConnection con = new SQLiteConnection(connectionString))
            {
                try
                {
                    con.Open();
                    string query = "select * from user where username='" + textBox1.Text + "'and password='" + textBox2.Text + "'";
                    SQLiteCommand createCmd = new SQLiteCommand(query, con);
                    createCmd.ExecuteNonQuery();
                    SQLiteDataReader dr = createCmd.ExecuteReader();

                    int count = 0;
                    while (dr.Read())
                    {
                        count++;
                    }
                    if(count ==1)
                    {
                        MessageBox.Show("Login Successful !!!");
                        string query1 = "select access from user where username='" + textBox1.Text + "'and password='" + textBox2.Text + "'";
                        
                        SQLiteCommand createCmd1 = new SQLiteCommand(query1, con);
                        createCmd1.ExecuteScalar();
                        if (query1 =="1")
                        {
                            Form2 form = new Form2();
                            this.Hide();
                            form.ShowDialog();
                        }
                        if (query1 == "2")
                        {
                            Form3 form = new Form3();
                            this.Hide();
                            form.ShowDialog();
                        }
                    }
                    
                }
                catch (Exception ex)
                {
                    
                }
            }
        }
        
    }
}