Nullable reference type in C#8 when using DTO classes with an ORM

You can do either of the following:

1. EF Core suggests initializing to null! with null-forgiving operator

   public string ServiceUrl { get; set; } = null! ;
   //or
   public string ServiceUrl { get; set; } = default! ;
   

2. Using backing field:

   private string _ServiceUrl;
   public string ServiceUrl
   {
       set => _ServiceUrl = value;
       get => _ServiceUrl
              ?? throw new InvalidOperationException("Uninitialized property: " + nameof(ServiceUrl));
   }