/// <summary>
/// 定制最大长度为maxLength的LruDictionary。
/// </summary>
/// <param name="maxLruLength">需要设置的LruDictionary的最大长度。</param>
/// <remarks>在默认情况下，LruDictionary的最大长度为100。此构造方法适用于构造指定最大长度的LruDictionary。
/// <code source="..\Framework\TestProjects\DeluxeWorks.Library.Test\Core\LruDictionaryTest.cs" region="LruDictionaryTest" lang="cs" title="获取最大长度为maxLength的LruDictionary"/>
/// <seealso cref="Framework.Core.EnumItemDescriptionAttribute"/>
/// </remarks>
public LruDictionary(int maxLruLength)
{
ExceptionHelper.TrueThrow <InvalidOperationException>(maxLruLength < 0, "maxLruLength must >= 0");
this.maxLength = maxLruLength;
}
/// <summary>
/// 判断LruDictionary中是否包含键值为Key值的元素
/// </summary>
/// <param name="key">键值Key</param>
/// <returns>若LruDictionary中包含键值为key值的元素,则返回true，否则返回false</returns>
/// <remarks>若返回值为true，由于该Key值的元素刚使用过，则把该元素放在LruDictionary的最前面。
/// <code source="..\Framework\TestProjects\DeluxeWorks.Library.Test\Core\LruDictionaryTest.cs" region ="ContainsKeyTest" lang="cs" title="判断LruDictionary中是否包含键值为key的元素"/>
/// <seealso cref="Framework.Core.EnumItemDescriptionAttribute"/>
/// </remarks>
public bool ContainsKey(TKey key)
{
ExceptionHelper.TrueThrow <ArgumentNullException>(key == null, "LruDictionary-ContainsKey-key");//add by yuanyong 20071227
return(this.innerDictionary.ContainsKey(key));
}