Cannot convert null literal to non-nullable reference type.

Non-nullable property 'ServiceType' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Dereference of a possibly null reference.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Price' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Country' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Email' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Converting null literal or possible null value to non-nullable type.