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An expression tree lambda may not contain a null propagating operator.

Upvote answer :-) answered on September 29, 2022 Popularity 8/10 Helpfulness 1/10

answer An expression tree lambda may not contain a null propagating operator.

An expression tree lambda may not contain a null propagating operator.

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//it is impossible to use the ? operator for checking if null (null propagating operator) 
//in an expression.
//this means u can not do:
cm.func(x => x.obj?.Count == 0 ? obj : null)
//when func is from the type of Expression<Func<>>
//you can only do:
cm.func(x => x.obj.Count == 0 ? obj : null)


//Reason: Expression can not contain statements but only expressions
// therefore obj? is banned and also u can not do if(null == obj)
//for the same reason

Popularity 8/10 Helpfulness 1/10 Language csharp

Source: Grepper

Tags: c# contain expression lambda null tree

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Contributed on Sep 29 2022

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An expression tree lambda may not contain a null propagating operator.

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An expression tree lambda may not contain a null propagating operator.

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