1

I want to use condition expression to choose lambda expression, like that:

xxxx.UsingFactory(
hasProofing? ( ()=>new ProofingA() ) : ( () => new ProofingB() )
);

But, it show me errors. So, if I want to do this thing, How should I do.

Error Detail:

no implicit conversion between 'lambda expression' and 'lambda expression'

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6
  • 1
    show me errors .. It is very helpful if you state those errors. Also, show the signature of the UsingFactory, what does it accept as parameters ? Do ProofingA and ProofingB inherit from the same object ? Commented Sep 5, 2016 at 5:28
  • implement from the same interface Commented Sep 5, 2016 at 5:32
  • Also, what xxx.UsingFactory() takes as parameter? may be it does not take an Action without parameters? try x=>new ProfingA() Commented Sep 5, 2016 at 5:33
  • You have to explicitly cast your lambdas. See this question, or maybe these ones Commented Sep 5, 2016 at 5:35
  • @v11 And does your method accept Func<iThatComonInterface> or accepts what exactly ? Just an Action ? Commented Sep 5, 2016 at 5:39

1 Answer 1

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2

You need to explicitly cast at least one of the lambdas. For example, if it's just a Action, then you could use the following:

xxxx.UsingFactory(
    hasProofing ? (Action)(() => new ProofingA()) : () => new ProofingB()
);
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