# System.Collections.Frozen

``` diff
 namespace System.Collections.Frozen {
     public static class FrozenSet {
+        public static FrozenSet<T> Create<T>(IEqualityComparer<T>? equalityComparer, ReadOnlySpan<T> source);
+        public static FrozenSet<T> Create<T>(ReadOnlySpan<T> source);
     }
 }
```

