Acepting the upload if excel columns and SQL table columns are equal

private static bool IsColumnsEqual(DataTable excel, SqlConnection con, string tableName)
      {
          SqlCommand cmd = new SqlCommand("select COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = @tableName", con);
          cmd.Parameters.AddWithValue("@tableName", tableName);
          SqlDataAdapter da = new SqlDataAdapter(cmd);
          DataTable dtColumns = new DataTable();
          da.Fill(dtColumns);
          List<string> lstColumnNames = new List<string>();
          foreach (DataRow row in dtColumns.Rows)
              lstColumnNames.Add(row["COLUMN_NAME"].ToString());

          string[] excelColumnNames = excel.Columns.OfType<DataColumn>().Select(k => k.ColumnName).ToArray();
          bool equals = excelColumnNames.Intersect(lstColumnNames).Count() == excelColumnNames.Union(lstColumnNames).Count();
          return equals;

      }

bool isEqual = IsColumnsEqual(dtExcel, con, "Your_Table_Name");
          if (isEqual) {
              // do upload
          }