C#

string Sql = "SELECT name FROM sys.databases";

                SqlCommand Comm = new SqlCommand(Sql, Conn);

                SqlDataAdapter da = new SqlDataAdapter(Comm);
                DataSet ds = new DataSet();
                da.Fill(ds);
                
		int cnt = ds.Tables[0].Rows.Count;
                string[] dbs = new string[cnt];

                for(int i = 0; i < cnt; i++)
                {
                 dbs[i] = ds.Tables[0].Rows[0]["name"].ToString();   
                }
 
                foreach(string s in dbs)
                {
                    databases.Items.Add(s);
                }