diff --git a/ICD.Common.Utils/Extensions/HashSetExtensions.cs b/ICD.Common.Utils/Extensions/HashSetExtensions.cs
deleted file mode 100644
index 4d17124..0000000
--- a/ICD.Common.Utils/Extensions/HashSetExtensions.cs
+++ /dev/null
@@ -1,85 +0,0 @@
-#if STANDARD
-using System.Collections.Generic;
-using System.Linq;
-using ICD.Common.Properties;
-
-namespace ICD.Common.Utils.Extensions
-{
-    public static class HashSetExtensions
-    {
-        [PublicAPI]
-        public static HashSet<T> Subtract<T>(this HashSet<T> extends, IEnumerable<T> set)
-        {
-            HashSet<T> subtractSet = new HashSet<T>(extends);
-
-            if (set == null)
-                return subtractSet;
-
-            foreach (T item in set)
-                subtractSet.Remove(item);
-
-            return subtractSet;
-        }
-
-        [PublicAPI]
-        public static bool IsSubsetOf<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            HashSet<T> setToCompare = set ?? new HashSet<T>();
-            return extends.All(setToCompare.Contains);
-        }
-
-        [PublicAPI]
-        public static HashSet<T> Intersection<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            HashSet<T> intersectionSet = new HashSet<T>();
-
-            if (set == null)
-                return intersectionSet;
-
-            foreach (T item in extends.Where(set.Contains))
-                intersectionSet.Add(item);
-
-            foreach (T item in set.Where(extends.Contains))
-                intersectionSet.Add(item);
-
-            return intersectionSet;
-        }
-
-        /// <summary>
-        /// Returns items that are not common between both sets.
-        /// </summary>
-        /// <param name="set"></param>
-        /// <returns></returns>
-        [PublicAPI]
-        public static HashSet<T> NonIntersection<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            return new HashSet<T>(extends.Subtract(set).Union(set.Subtract(extends)));
-        }
-
-        [PublicAPI]
-        public static bool IsProperSubsetOf<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            HashSet<T> setToCompare = set ?? new HashSet<T>();
-
-            // Is a proper subset if A is a subset of B and A != B
-            return (extends.IsSubsetOf(setToCompare) && !setToCompare.IsSubsetOf(extends));
-        }
-
-        [PublicAPI]
-        public static bool IsSupersetOf<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            HashSet<T> setToCompare = set ?? new HashSet<T>();
-            return setToCompare.IsSubsetOf(extends);
-        }
-
-        [PublicAPI]
-        public static bool IsProperSupersetOf<T>(this HashSet<T> extends, HashSet<T> set)
-        {
-            HashSet<T> setToCompare = set ?? new HashSet<T>();
-
-            // B is a proper superset of A if B is a superset of A and A != B
-            return (extends.IsSupersetOf(setToCompare) && !setToCompare.IsSupersetOf(extends));
-        }
-    }
-}
-#endif
\ No newline at end of file