Depending on your unique identifier. C # has a class Guidthat is used for globally unique identifiers, or if it is for a database, and you only have an incremental identification number, like an identifier, and intwill be ok. Depending on how you create the identifier and what you use it for, but usually a unique identifier is presented in C # Guidor a globally unique identifier
Guid uniqueId = Guid.NewGuid();
public IQueryable<Report_person>GetPerson(Guid personId) {}