1 files changed, 19 insertions, 0 deletions
diff --git a/crypto/src/util/collections/ISet.cs b/crypto/src/util/collections/ISet.cs
new file mode 100644
index 000000000..1f8edba40
--- /dev/null
+++ b/crypto/src/util/collections/ISet.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Utilities.Collections
+{
+	public interface ISet
+		: ICollection
+	{
+		void Add(object o);
+		void AddAll(IEnumerable e);
+		void Clear();
+		bool Contains(object o);
+		bool IsEmpty { get; }
+		bool IsFixedSize { get; }
+		bool IsReadOnly { get; }
+		void Remove(object o);
+		void RemoveAll(IEnumerable e);
+	}
+}