public
Created

Read-only generic dictionary

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ReadOnlyDictionary.cs
C#
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public class ReadOnlyDictionary<TKey, TValue> : IDictionary<TKey, TValue>
{
private readonly IDictionary<TKey, TValue> dictionary;
 
public ReadOnlyDictionary()
{
this.dictionary = new Dictionary<TKey, TValue>();
}
 
public ReadOnlyDictionary(IDictionary<TKey, TValue> dictionary)
{
this.dictionary = dictionary;
}
 
public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
{
return this.dictionary.GetEnumerator();
}
 
IEnumerator IEnumerable.GetEnumerator()
{
return this.dictionary.GetEnumerator();
}
 
public void Add(KeyValuePair<TKey, TValue> item)
{
throw new NotSupportedException();
}
 
public void Clear()
{
throw new NotSupportedException();
}
 
public bool Contains(KeyValuePair<TKey, TValue> item)
{
return this.dictionary.Contains(item);
}
 
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex)
{
this.dictionary.CopyTo(array, arrayIndex);
}
 
public bool Remove(KeyValuePair<TKey, TValue> item)
{
throw new NotSupportedException();
}
 
public int Count
{
get { return this.dictionary.Count; }
}
 
public bool IsReadOnly
{
get { return true; }
}
 
public bool ContainsKey(TKey key)
{
return this.dictionary.ContainsKey(key);
}
 
public void Add(TKey key, TValue value)
{
throw new NotSupportedException();
}
 
public bool Remove(TKey key)
{
throw new NotSupportedException();
}
 
public bool TryGetValue(TKey key, out TValue value)
{
return this.dictionary.TryGetValue(key, out value);
}
 
public TValue this[TKey key]
{
get { return this.dictionary[key]; }
set { throw new NotSupportedException(); }
}
 
public ICollection<TKey> Keys
{
get { return this.dictionary.Keys; }
}
 
public ICollection<TValue> Values
{
get { return this.dictionary.Values; }
}
}

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