一个简单的类的继承的写法(C#)

u      一个简单的类的继承的写法(C#)

 public class HashTable : Hashtable

    {

        public HashTable()

        {}

        public override object this[object key]

        {

            get

            {

                try

                {

                    key = key.ToString().ToLower();

                }

                catch(Exception ex)

                {}

                return base[key];

            }

            set

            {

                try

                {

                    key = key.ToString().ToLower();

                }

                catch(Exception ex)

                {}

                base[key] = value;

            }

        }

        public override void Add(object key, object value)

        {

            try

            {

                key = key.ToString().ToLower();

            }

            catch(Exception ex)

            {}

            base.Add (key, value);

        }

        public override void Clear()

        {

            base.Clear ();

        }

        public override void Remove(object key)

        {

            try

            {

                key = key.ToString().ToLower();

            }

            catch(Exception ex)

            {}

            base.Remove (key);

        }

        public override IDictionaryEnumerator GetEnumerator()

        {

            return base.GetEnumerator();

        }

        public override bool Contains(object key)

        {

            try

            {

                key = key.ToString().ToLower();

            }

            catch(Exception ex)

            {}

            return base.Contains (key);

        }

        public override bool ContainsKey(object key)

        {

            try

            {

                key = key.ToString().ToLower();

            }

            catch(Exception ex)

            {}

            return base.ContainsKey (key);

        }

 

}

 

 

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