72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="StringDictionaryWithComparer.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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// StringDictionary compares keys by converting them to lowercase first, using the Invariant culture.
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// This is not the right thing to do for file names, registry keys, environment variable etc.
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// This internal version of StringDictionary accepts an IEqualityComparer and enables you to
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// customize the string comparison to be StringComparer.OrdinalIgnoreCase for the above cases.
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namespace System.Collections.Specialized {
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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using System;
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using System.Collections;
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using System.ComponentModel.Design.Serialization;
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using System.Globalization;
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[Serializable]
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internal class StringDictionaryWithComparer : StringDictionary {
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public StringDictionaryWithComparer() : this(StringComparer.OrdinalIgnoreCase) {
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}
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public StringDictionaryWithComparer(IEqualityComparer comparer) {
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ReplaceHashtable(new Hashtable(comparer));
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}
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public override string this[string key] {
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get {
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if( key == null ) {
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throw new ArgumentNullException("key");
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}
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return (string) contents[key];
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}
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set {
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if( key == null ) {
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throw new ArgumentNullException("key");
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}
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contents[key] = value;
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}
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}
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public override void Add(string key, string value) {
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if( key == null ) {
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throw new ArgumentNullException("key");
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}
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contents.Add(key, value);
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}
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public override bool ContainsKey(string key) {
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if( key == null ) {
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throw new ArgumentNullException("key");
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}
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return contents.ContainsKey(key);
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}
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public override void Remove(string key) {
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if( key == null ) {
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throw new ArgumentNullException("key");
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}
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contents.Remove(key);
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}
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}
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}
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