Case-insensitive Contains extension for list of strings

I wanted to have case-insensitive Contains method for list of strings.
Overload Enumerable.Contains<TSource> Method (IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) expects custom IEqualityComparer class.I was about to create my own class IgnoreCaseEqualityComparer : IEqualityComparer<string>,
but then found StringComparer.Create Method, that allow to use standard class.

public static bool ContainsString(this IEnumerable<string> collection, string toFind, bool ignoreCase = true)
return collection.Contains(toFind,
StringComparer.Create(CultureInfo.InvariantCulture, ignoreCase));