1 files changed, 44 insertions, 0 deletions
diff --git a/Crypto/src/util/collections/EmptyEnumerable.cs b/Crypto/src/util/collections/EmptyEnumerable.cs
new file mode 100644
index 000000000..a61a0789a
--- /dev/null
+++ b/Crypto/src/util/collections/EmptyEnumerable.cs
@@ -0,0 +1,44 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Utilities.Collections
+{
+ public sealed class EmptyEnumerable
+ : IEnumerable
+ {
+ public static readonly IEnumerable Instance = new EmptyEnumerable();
+
+ private EmptyEnumerable()
+ {
+ }
+
+ public IEnumerator GetEnumerator()
+ {
+ return EmptyEnumerator.Instance;
+ }
+ }
+
+ public sealed class EmptyEnumerator
+ : IEnumerator
+ {
+ public static readonly IEnumerator Instance = new EmptyEnumerator();
+
+ private EmptyEnumerator()
+ {
+ }
+
+ public bool MoveNext()
+ {
+ return false;
+ }
+
+ public void Reset()
+ {
+ }
+
+ public object Current
+ {
+ get { throw new InvalidOperationException("No elements"); }
+ }
+ }
+}
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