What does x?.y?.z mean?

Question

The draft spec for Pattern Matching in C# contains the following code example:

Type? v = x?.y?.z; 
if (v.HasValue) {
    var value = v.GetValueOrDefault();           


        

Answer 1

 this.SlimShadies.SingleOrDefault(s => s.IsTheReal)?.PleaseStandUp();

Basically.