C# if-null-then-null expression

Question

Just for curiosity/convenience: C# provides two cool conditional expression features I know of:

string trimmed = (input == null) ? null : input.Trim();
         


        

Answer 1

You can choose between a custom Nullify class or a NullSafe extension method as described here: http://qualityofdata.com/2011/01/27/nullsafe-dereference-operator-in-c/

The usage will be as follows:

//Groovy:
bossName = Employee?.Supervisor?.Manager?.Boss?.Name

//C# Option 1:
bossName = Nullify.Get(Employee, e => e.Supervisor, s => s.Manager,
                       m => m.Boss, b => b.Name);
//C# Option 2:
bossName = Employee.NullSafe( e => e.Supervisor ).NullSafe( s => s.Boss )
                      .NullSafe( b => b.Name );