[corlib] Mark ConcurrentDictionary serializable. Fixes #16730

diff --git a/mcs/class/corlib/System.Collections.Concurrent/ConcurrentDictionary.cs b/mcs/class/corlib/System.Collections.Concurrent/ConcurrentDictionary.cs
index bb8e99f704eba9cef4241772f12297f1e6069c9c..a52ced14f857b6edce920d0e410169fcc22bfcf6 100644 (file)
--- a/mcs/class/corlib/System.Collections.Concurrent/ConcurrentDictionary.cs
+++ b/mcs/class/corlib/System.Collections.Concurrent/ConcurrentDictionary.cs
@@ -35,6 +35,7 @@ namespace System.Collections.Concurrent
 {
        [DebuggerDisplay ("Count={Count}")]
        [DebuggerTypeProxy (typeof (CollectionDebuggerView<,>))]
+       [Serializable]
        public class ConcurrentDictionary<TKey, TValue> : IDictionary<TKey, TValue>,
          ICollection<KeyValuePair<TKey, TValue>>, IEnumerable<KeyValuePair<TKey, TValue>>,
          IDictionary, ICollection, IEnumerable