errorin where clause

I am trying to read some data from a db but I am getting an error on oledbdatareader.

here is my code.

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Power User\Desktop\Domains.accdb;Persist Security Info=False");
            conn.Open();
            OleDbCommand cmd = new OleDbCommand();
            cmd.Connection = conn;
            //cmd.CommandText = "Select * from Domains";
            cmd.CommandText = "Select * FROM Domains WHERE Domain= '" + TextBox1.Text + "'";
            OleDbDataReader dr = cmd.ExecuteReader();
            GridView1.DataSource = dr;
            GridView1.DataBind();
            conn.Close();