CODEWITHSUNDEEP
c#
Erik83
Erik83

Reputation: 549

Shorten and simply conditional statement?

I have this statement (which works):

x => x is View v && (x as View).IsTemplate

where the IsTemplate property only exists on the derived type View

I would like to shorten it to:

x => x is View v & v.IsTemplate

But I cant, I get the error "use of unassigned local variable". Eventhough intellisense gives me the IsTemplate property. Is this impossible, or did I miss something in the syntax? It looks much nicer and I cant see any logic issues with it.

Upvotes: 3

Views: 90

Answers (2)

Spotted
Spotted

Reputation: 4091

If you are before C#7, otherwise use Selman's answer.

x => (x as View)?.IsTemplate ?? false;

Upvotes: 4

Selman Genç
Selman Genç

Reputation: 101681

It's because you are using & operator in the second code, the right side will be evaluated even though the left operand evaluates to false. You should change it to &&

x => x is View v && v.IsTemplate

Upvotes: 6

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