Passing CLOB value to stored procedure from c# code

I have a  stored procedure (as below) which basically iterates through the passed in values array_mq_rid_in and updates the records. array_mq_rid_in value can be greater than 50K so I have its datatype accepted as clob. this stored procedure works fine...

My question is how do I send this string value to clob...from c# method. how do I convert/pass ridCSV to clob type from c# --> "p0.Value = ridCSV; " . Because when I execute below code with more than 50K of ridCSV it throws an exception such as "ORA-01460: unimplemented or unreasonable conversion requested".

C# Method:
public bool MigrateStudies(string ridCSV)
                //set parameters
                OracleParameter p0 = new OracleParameter("ARRAY_MQ_RID_IN", OracleType.Clob);
                p0.Value = ridCSV;
                //execute update statement to database
                int rowsAffected = ExecuteNonQuery(CommandType.StoredProcedure, "MIGRATEROWS", p0);
                if (rowsAffected > 0)
                    return true;
                    return false;
            catch (Exception ex)
                throw ex;


SQL Procedure:
      array_mq_rid_in IN CLOB
  tbl_rid mdig_util.mq_rid_table;
  currentDate date;
      -- Call Function to convert array_mq_rid_in (csv string) to table
      tbl_rid := mdig_util.CovertRIDStringToArray(array_mq_rid_in);

      -- If tbl_rid returned from the function is not null then continue with update
      IF tbl_rid IS NOT NULL THEN
            FOR i IN tbl_rid.FIRST..tbl_rid.LAST
                        -- Set migrate now timestamp, also clear postponed or declined status
                        -- and make sure study is queued
                        SELECT SYSDATE into currentDate FROM dual;
                        UPDATE migrationqueue
                              SET POSTPONED = 'NO',
                              postponed_comment = '',
                              declined = 'NO',
                              declined_comment = '',      
                              queued = 'YES',       
                              move_retry = 0,
                              copy_retry = 0,
                              store_retry = 0,       
                              MIGRATE_NOW_TIMESTAMP = currentDate            
                        where rid = (tbl_rid(i));
                  END LOOP;
      END IF;
END MigrateNowStudies;
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