✅ EF Core navigational properties

class Business
- ...
- Address Address { get; set; }

class Address
- ...

class Business
- ...
- Address Address { get; set; }

class Address
- ...

class Business
- ...
- Address Address { get; set; }

class Address
- ...
- Business { get; set; }

class Business
- ...
- Address Address { get; set; }

class Address
- ...
- Business { get; set; }

InvalidOperationException: The value of 'Address.Id' is unknown when attempting to save changes. This is because the property is also part of a foreign key for which the principal entity in the relationship is not known

InvalidOperationException: The value of 'Address.Id' is unknown when attempting to save changes. This is because the property is also part of a foreign key for which the principal entity in the relationship is not known

            var address = new Address
            {
                Street = "SName",
                City = "CName",
            };

            await dbContext.Addresses.AddAsync(address);

            var address = new Address
            {
                Street = "SName",
                City = "CName",
            };

            await dbContext.Addresses.AddAsync(address);