How to check if all of the elements in a list return true for a property using Linq?

Question

I would like to have a LINQ statement that calls the property IsValid.
If all elements returned true, I want the statement to return true as well.
How can it be done?

Answer 1

I am not sure if this is what you are looking for, but take a look at this article. http://www.albahari.com/nutshell/predicatebuilder.aspx

Answer 2

var allValid = myList.All(item => item.IsValid);

Answer 3

You need the Enumerable.All<TSource> method:

bool everythingsZen = anEnumerable.All(a => a.IsValid);