修复可能的空指针异常

ConsoleApp2/Program.cs

@@ -294,7 +294,7 @@ async Task RunProgram()
                     var fields =new List<string>(record.Fields);
                     headers.Add("CompanyID");
                     var companyidResult =await cache.GetStringAsync(id);
-                    _ = int.TryParse(companyidResult.ToString(), out var companyid);
+                    _ = int.TryParse(companyidResult, out var companyid);
                     fields.Add(companyid.ToString());
                     return new DataRecord(fields.ToArray(), record.TableName, headers.ToArray(), companyid);
                 }