'Incorrect syntax near 'maha986javed'.'

I am making a login panel in winform C#. here when I try to check for the password and username that if they are in database or not, then I have a error:

If I enter nothing then it display wrong info message correctly.

but when i write password whether right or wrong it gives this error

System.Data.SqlClient.SqlException
  HResult=0x80131904
  Message=Incorrect syntax near 'maha986javed'

SqlConnection con = new SqlConnection("Data Source=DESKTOP-7VO9EU6; Initial Catalog=Registration; Integrated Security=True;");
SqlCommand cmd;

private void loginbutton_Click(object sender, EventArgs e)
        {
            con.Open();
            cmd = new SqlCommand("Select * from UserInfo where Username="+textname.Text+"'And Password ='"+textpassword.Text+"''" ,con);
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.HasRows)
            {
                while (reader.Read())
                {
                    infotext.Text = reader["Email"].ToString();
                }
            }
            else
            {
                MessageBox.Show("Wrong info");
            }
            reader.Close();
            cmd.ExecuteNonQuery();

        }