1 files changed, 64 insertions, 0 deletions
diff --git a/Crypto/src/util/collections/UnmodifiableDictionary.cs b/Crypto/src/util/collections/UnmodifiableDictionary.cs
new file mode 100644
index 000000000..0bdf70ad7
--- /dev/null
+++ b/Crypto/src/util/collections/UnmodifiableDictionary.cs
@@ -0,0 +1,64 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Utilities.Collections
+{
+ public abstract class UnmodifiableDictionary
+ : IDictionary
+ {
+ protected UnmodifiableDictionary()
+ {
+ }
+
+ public virtual void Add(object k, object v)
+ {
+ throw new NotSupportedException();
+ }
+
+ public virtual void Clear()
+ {
+ throw new NotSupportedException();
+ }
+
+ public abstract bool Contains(object k);
+
+ public abstract void CopyTo(Array array, int index);
+
+ public abstract int Count { get; }
+
+ IEnumerator IEnumerable.GetEnumerator()
+ {
+ return GetEnumerator();
+ }
+
+ public abstract IDictionaryEnumerator GetEnumerator();
+
+ public virtual void Remove(object k)
+ {
+ throw new NotSupportedException();
+ }
+
+ public abstract bool IsFixedSize { get; }
+
+ public virtual bool IsReadOnly
+ {
+ get { return true; }
+ }
+
+ public abstract bool IsSynchronized { get; }
+
+ public abstract object SyncRoot { get; }
+
+ public abstract ICollection Keys { get; }
+
+ public abstract ICollection Values { get; }
+
+ public virtual object this[object k]
+ {
+ get { return GetValue(k); }
+ set { throw new NotSupportedException(); }
+ }
+
+ protected abstract object GetValue(object k);
+ }
+}
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