Please try this code:
List<string> strs = new List<string>() { "AB", "1", "EACH", "Employee" };
IList<IWebElement> MaterialsUsedList = UIServices._workOrderCompletedService.GetMaterials();
List<string> texts = MaterialsUsedList.Select(s => s.Text).ToList() ;
bool re = strs.All(texts.Contains);
First extract the property IWebElement.Text that needs to be compared, and then if you need the result list to be the same as the previous list elements and the order of the elements is also the same, please follow Karen's suggestion to use SequenceEqual, if the order may be different, you can use Enumerable. All.
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