Question

I have an ObservableCollection as shown below:

ObservableCollection<Tuple<Guid, string>> _taskCollection

I want to write some code that will check if a given string exists in the collection. The string is held in “TaskName” and the code I wrote looks like this:

_taskCollection.Select(x => x.Item2 == TaskName.Trim()).Any()

The problem I have is that this line of code always returns “true” regardless of whether the value in “TaskName” is in one of the Tuple’s or not. Can anyone show me what I am missing?

Answer 1

You should use Any directly rather than after Select:

_taskCollection.Any(x => x.Item2 == TaskName.Trim())

This code:

_taskCollection.Select(x => x.Item2 == TaskName.Trim())

will return a list of bool which has length equivalent with _taskCollection, so then you call Any, it’s always true