ReadOnlyDictionary.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Internal / ReadOnlyDictionary.cs / 1 / ReadOnlyDictionary.cs
                        

                        
                            //------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.Collections.Generic;
 
namespace System.Speech.Internal
{

    internal class ReadOnlyDictionary : IDictionary 
    {
        public int Count 
        { 
            get { return _dictionary.Count; }
        } 

        public IEnumerator> GetEnumerator ()
        {
            return _dictionary.GetEnumerator (); 
        }
 
        public V this [K key] 
        {
            get { return _dictionary [key]; } 
            set { throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly)); }
        }

        // Other methods are a pass through to the underlying collection: 

        public bool IsReadOnly 
        { 
            get { return true; }
        } 

        public bool Contains (KeyValuePair key)
        {
            return _dictionary.ContainsKey (key.Key); 
        }
 
        public bool ContainsKey (K key) 
        {
            return _dictionary.ContainsKey (key); 
        }

        public void CopyTo (KeyValuePair [] array, int index)
        { 
            ((ICollection>) _dictionary).CopyTo (array, index);
        } 
 
        public ICollection Keys
        { 
            // According to the source of IDictionary.Keys this is a read-only collection.
            get { return _dictionary.Keys; }
        }
 
        public ICollection Values
        { 
            // According to the source of IDictionary.Keys this is a read-write collection, 
            // but is a copy of the main dictionary so there's no way to change anything in the main collection.
            get { return _dictionary.Values; } 
        }

        // Read-only collection so throw on these methods:
 
        public void Add (KeyValuePair key)
        { 
            throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly)); 
        }
 
        public void Add (K key, V value)
        {
            throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly));
        } 

        public void Clear () 
        { 
            throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly));
        } 

        public bool Remove (KeyValuePair key)
        {
            throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly)); 
        }
 
        public bool Remove (K key) 
        {
            throw new NotSupportedException (SR.Get (SRID.CollectionReadOnly)); 
        }

        IEnumerator IEnumerable.GetEnumerator ()
        { 
            return ((IEnumerable>) this).GetEnumerator ();
        } 
 
        bool IDictionary.TryGetValue (K key, out V value)
        { 
            return InternalDictionary.TryGetValue (key, out value);
        }

        // Allow internal code to manipulate internal collection 
        internal Dictionary InternalDictionary
        { 
            get { return _dictionary; } 
            //set { _dictionary = value; }
        } 

        private Dictionary _dictionary = new Dictionary ();

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK