Cleaner way to do a null check in C#? [duplicate]

Answer 1

in your case you could create a property for person

public bool HasCity
{
   get 
   { 
     return (this.Contact!=null && this.Contact.Address!= null && this.Contact.Address.City != null); 
   }     
}

but you still have to check if person is null

if (person != null && person.HasCity)
{

}

to your other question, for strings you can also check if null or empty this way:

string s = string.Empty;
if (!string.IsNullOrEmpty(s))
{
   // string is not null and not empty
}
if (!string.IsNullOrWhiteSpace(s))
{
   // string is not null, not empty and not contains only white spaces
}