1using System;
2using System.Configuration;
3
4namespace HelpersDotNet.Configuration
5{
6    public abstract class ConfigurationElementCollectionBase<T> :
7        ConfigurationElementCollection where T : ConfigurationElement
8    {
9        public override ConfigurationElementCollectionType CollectionType
10        {
11            get { return ConfigurationElementCollectionType.AddRemoveClearMap; }
12        }
13
14        public T this[int index]
15        {
16            get { return (T)base.BaseGet(index); }
17            set
18            {
19                if (base.BaseGet(index) != null)
20                    base.BaseRemoveAt(index);
21
22                base.BaseAdd(index, value);
23            }
24        }
25
26        new public T this[string key]
27        {
28            get { return (T)base.BaseGet(key); }
29        }
30
31        public void Add(T element)
32        {
33            base.BaseAdd(element);
34        }
35
36        public void Clear()
37        {
38            base.BaseClear();
39        }
40
41        public bool Contains(string key)
42        {
43            return base.BaseGet(key) != null;
44        }
45
46        protected override ConfigurationElement CreateNewElement()
47        {
48            return Activator.CreateInstance<T>();
49        }
50
51        public void Remove(string key)
52        {
53            base.BaseRemove(key);
54        }
55
56        public void RemoveAt(int index)
57        {
58            base.BaseRemoveAt(index);
59        }
60    }
61}