GetTableList.cs

private DataTable GetTableList()
{
    DataTable dt;
    string sQuery = @"SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE'";
    using (SqlConnection conn = new SqlConnection(_connectionString))
    {
        using (SqlCommand command = new SqlCommand(sQuery, conn))
        {
            conn.Open();
            DataAdapter da = new SqlDataAdapter(command);
            DataSet ds = new DataSet();
            da.Fill(ds);
            dt = ds.Tables[0];
        }
    }
    return dt;
}