Get next sequence value using NEXTVAL in Oracle

Hi

I want get next sequence next value for identity id using db first code.

For below code: I don't use entity framework.

SaveToDBZypl saveToDBZypl = new SaveToDBZypl();
saveToDBZypl.STATUS = zyplDeserializedClass.result.status;
saveToDBZypl.PROB =  Convert.ToInt32(zyplDeserializedClass.result.prob);
saveToDBZypl.MESSAGE = zyplDeserializedClass.result.message;
saveToDBZypl.PREDICTION = zyplDeserializedClass.result.prediction;
saveToDBZypl.SHAP_LINK = zyplDeserializedClass.result.shap_link;
saveToDBZypl.ZYPL_ID = zyplDeserializedClass.result.id;
saveToDBZypl.INSERT_DATE = DateTime.Now;
saveToDBZypl.APPLICATION_ID = sendToZypl.data.Id;
int sequence = _context.Database.SqlQuery<int>("select NBM.EL_GLOBAL_SEQUENCE.nextval from DUAL").First();
saveToDBZypl.ID = sequence;
if (ModelState.IsValid)
{
    _context.SaveToDBZypls.Add(saveToDBZypl);
    _context.SaveChanges();
}

//My porblem with this part code:
int sequence = context.Database.SqlQuery<int>("select NBM.EL_GLOBAL_SEQUENCE.nextval from DUAL").First();

Need convert it to database first.