OracleBulkCopy WriteToServer method not working.

 I have Oracle19c is database and Oracle.DataAccess is ODP.Net with version 2.122.19.0, and application is developed in .Net framework 4.5.2, I have done POC on bulk copy records into database table where getting error as "ORA-39826 : Direct path load of view or Synonym (UserNameXXX.TableNameXX) could not be resolved.

Where I have added for deleting a records from mentioned table which is working fine, exactly above the where error occured It would be great if someone help me with solution.

I have follow the exact same steps mentioned in Two Ways To Insert Bulk Data Into Oracle Database Using C# (c-sharpcorner.com) in Second Option for Bulk Copy.