1 files changed, 59 insertions, 0 deletions
diff --git a/Crypto/src/util/collections/UnmodifiableSet.cs b/Crypto/src/util/collections/UnmodifiableSet.cs
new file mode 100644
index 000000000..8792815ac
--- /dev/null
+++ b/Crypto/src/util/collections/UnmodifiableSet.cs
@@ -0,0 +1,59 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Utilities.Collections
+{
+ public abstract class UnmodifiableSet
+ : ISet
+ {
+ protected UnmodifiableSet()
+ {
+ }
+
+ public virtual void Add(object o)
+ {
+ throw new NotSupportedException();
+ }
+
+ public virtual void AddAll(IEnumerable e)
+ {
+ throw new NotSupportedException();
+ }
+
+ public virtual void Clear()
+ {
+ throw new NotSupportedException();
+ }
+
+ public abstract bool Contains(object o);
+
+ public abstract void CopyTo(Array array, int index);
+
+ public abstract int Count { get; }
+
+ public abstract IEnumerator GetEnumerator();
+
+ public abstract bool IsEmpty { get; }
+
+ public abstract bool IsFixedSize { get; }
+
+ public virtual bool IsReadOnly
+ {
+ get { return true; }
+ }
+
+ public abstract bool IsSynchronized { get; }
+
+ public abstract object SyncRoot { get; }
+
+ public virtual void Remove(object o)
+ {
+ throw new NotSupportedException();
+ }
+
+ public virtual void RemoveAll(IEnumerable e)
+ {
+ throw new NotSupportedException();
+ }
+ }
+}
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