How to get User Defined Fields within a Custom List Type using SharePoint 2010 Event Reiever

Live Task How to get User Defined Fields within a Custom List Type using SharePoint 2010 Event Reiever

ArrayList ArrColumnNames = new ArrayList();

               ArrayList ArrOldValues = new ArrayList();

               SPListItem item = properties.ListItem;

               for (int i = 0; i <= properties.List.Fields.Count - 1; i++)

               {

                   if (!properties.List.Fields[i].Hidden && !properties.List.Fields[i].ReadOnlyField && properties.List.Fields[i].Type != SPFieldType.Attachments && properties.List.Fields[i].Title != "Content Type")

                   {

                       ArrColumnNames.Add(properties.List.Fields[i].StaticName);

                       if (item[properties.List.Fields[i].StaticName] != null)

                       {

                           string strColumnName = properties.List.Fields[i].StaticName.ToString();

                           ArrColumnNames.Add(strColumnName);

                           if(item[strColumnName]!=null)

                           {

                               ArrOldValues.Add(item[strColumnName]).ToString();

                           }

                       }

                   }

               }

               string strSqlServerFieldName = "";

               string strSqlServerOldFieldValue = "";

               for (int j = 0; j < ArrColumnNames.Count - 1; j++)

               {

                   strSqlServerFieldName+= ArrColumnNames[j].ToString()+"!!";

                   strSqlServerOldFieldValue+= ArrOldValues[j].ToString()+"!!";

               }