Compare two sets of data where I want to confirm ALL elements in one subset can be found in the other superset

CompareSets.cs

var subset = new[] { 2, 4, 6, 8 };
var superset = new[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };


// (when comparing small sets, consider O(n*m) solution:)
public static bool ContainsAll<T>(this IEnumerable<T> source, IEnumerable<T> values)
{
    bool contained = !subset.Except(superset).Any
    
    return contained;
}


// (when comparing large sets, consider O(n+m) solution:)
public static bool ContainsAll<T>(this IEnumerable<T> source, IEnumerable<T> values)
{
    HashSet<int> hashSet = new HashSet<int>(superset);
    bool contained = subset.All(i => hashSet.Contains(i));
    
    return contained;
}

// or 
public static bool ContainsAll<T>(this IEnumerable<T> source, IEnumerable<T> values)
{
    return values.All(value => source.Contains(value));
}