CODEWITHSUNDEEP
c#resharper
Ekta
Ekta

Reputation: 321

Resharper throwing Possible 'System.InvalidOperationException'

I have written the below code but resharper is throwing

Possible 'System.InvalidOperationException'

What could be the reason?

Assert.Null(actual.Items?.FirstOrDefault(x => x.Date.Value.Year == 2019).Growth);

Upvotes: 0

Views: 217

Answers (2)

Pavel Anikhouski
Pavel Anikhouski

Reputation: 23268

FirstOrDefault call may return null and you'll get an exception when accessing Growth property, try to use null conditional operator ?. one more time, like FirstOrDefault(x => x.Date.Value.Year == 2019)?.Growth. It allows to avoid a NullReferenceException

As for InvalidOperationException, x.Date seems to have a Nullable<DateTime> type, you should use HasValue property before getting a Value, like x => x.Date.HasValue && x.Date.Value.Year == 2019. Or GetValueOrDefault() method x => x.Date.GetValueOrDefault().Year == 2019. Or even simper ?. operator again x => x.Date?.Year == 2019

Upvotes: 1

Prince Khanna
Prince Khanna

Reputation: 66

I guess you should check for the

actual.Items?.FirstOrDefault(x => x.Date.Value.Year == 2019) to be null first and then go for take it in variable as

var currentItem = actual.Items?.FirstOrDefault(x => x.Date.Value.Year == 2019);
Assert.Null(currentItem .Growth);

Upvotes: 0

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