Entity Framework update field from other fields of the same class/model

Question

public class Person
{
     public string FirstName { get; set; } = string.Empty
     public string LastName { get; set; } = string.Empty
     public string FullName { get; set; } = string.Empty
}

How can I update FullName as

FullName = $"{FirstName} {LastName}"

Placing the above line in the constructor doesn't seem to cut it as values of FirstName & LastName seems to be default and Entity Framework persists as an empty string too.

How can I make this work with EF without explicitly calling a method or assigning directly to the field FullName from other classes?

Package: EF Core Cosmos 3.1

Answer 1

If you don't need to persist the FullName property, you can go with:

[NotMapped]
public string FullName => $"{FirstName} {LastName}";