Question

i’m trying to find all the tags which equal a name from a list of words.

for example :-

public class Tag
{
   public int Id { get; set; }
   public string Name { get; set; }
   public string UserId { get; set; }
}

// Arrange.
var searchWords = new List<string>(new [] {"c#", ".net", "rails"});
var tags = new Tags
               {
                   new Tag { Name = "c#" },
                   new Tag { Name = "pewpew" },
                   new Tag { Name = "linq" },
                   new Tag { Name = "iis" }
               };

// Act.
// Grab all the tags given the following search words => 'c#' '.net' and 'rails'
// Expected: 1 result.
var results = ???

// Assert.
Assert.NotNull(results);
Assert.Equal(1, results.Count);
Assert.Equal("c#", results.First());

I’ve been trying to use Any or Contains but my code just doesn’t compile.

NOTE: Can be .NET 4.0

Answer 1

Does this work for you?

var results = tags.Where(t => 
    searchWords.Contains(t.Name, StringComparer.InvariantCultureIgnoreCase));

Also note that since results is IEnumerable<T> you will need to use the method results.Count() instead of the property results.Count in your assert. Count is a property defined by the ICollection interface.