不，但是包装器很简单：
public class ReadOnlyDictionary<TKey, TValue> : IDictionary<TKey, TValue>{ IDictionary<TKey, TValue> _dict; public ReadonlyDictionary(IDictionary<TKey, TValue> backingDict) { _dict = backingDict; } public void Add(TKey key, TValue value) { throw new InvalidOperationException(); } public bool ContainsKey(TKey key) { return _dict.ContainsKey(key); } public ICollection<TKey> Keys { get { return _dict.Keys; } } public bool Remove(TKey key) { throw new InvalidOperationException(); } public bool TryGetValue(TKey key, out TValue value) { return _dict.TryGetValue(key, out value); } public ICollection<TValue> Values { get { return _dict.Values; } } public TValue this[TKey key] { get { return _dict[key]; } set { throw new InvalidOperationException(); } } public void Add(KeyValuePair<TKey, TValue> item) { throw new InvalidOperationException(); } public void Clear() { throw new InvalidOperationException(); } public bool Contains(KeyValuePair<TKey, TValue> item) { return _dict.Contains(item); } public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) { _dict.CopyTo(array, arrayIndex); } public int Count { get { return _dict.Count; } } public bool IsReadonly { get { return true; } } public bool Remove(KeyValuePair<TKey, TValue> item) { throw new InvalidOperationException(); } public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() { return _dict.GetEnumerator(); } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return ((System.Collections.IEnumerable)_dict).GetEnumerator(); }}显然，如果要允许修改值，可以更改上面的this []设置器。
