1 files changed, 34 insertions, 0 deletions
diff --git a/dotnet/Mammoth/Couscous/java/util/HashSet.cs b/dotnet/Mammoth/Couscous/java/util/HashSet.cs
new file mode 100644
index 0000000..ac10075
--- /dev/null
+++ b/dotnet/Mammoth/Couscous/java/util/HashSet.cs
@@ -0,0 +1,34 @@
+using System.Collections.Generic;
+
+namespace Mammoth.Couscous.java.util {
+    internal class HashSet<T> : Set<T> {
+        private readonly ISet<T> _set;
+
+        internal HashSet() : this(new System.Collections.Generic.HashSet<T>()) {
+        }
+        
+        internal HashSet(ISet<T> set) {
+            _set = set;
+        }
+        
+        public Iterator<T> iterator() {
+            return ToJava.EnumeratorToIterator(_set.GetEnumerator());
+        }
+        
+        public bool isEmpty() {
+            return _set.Count == 0;
+        }
+        
+        public int size() {
+            return _set.Count;
+        }
+
+        public bool contains(object value) {
+            return value is T && _set.Contains((T)value);
+        }
+        
+        public void add(T value) {
+            _set.Add(value);
+        }
+    }
+}