SettingsPropertyValueCollection
Contains a collection of settings property values that map SettingsProperty objects to SettingsPropertyValue objects.
using System.Collections;
namespace System.Configuration
{
public class SettingsPropertyValueCollection : IEnumerable, ICloneable, ICollection
{
private readonly Hashtable _indices;
private ArrayList _values;
private bool _readOnly;
public SettingsPropertyValue this[string name] {
get {
object obj = _indices[name];
if (obj == null || !(obj is int))
return null;
int num = (int)obj;
if (num >= _values.Count)
return null;
return (SettingsPropertyValue)_values[num];
}
}
public int Count => _values.Count;
public bool IsSynchronized => false;
public object SyncRoot => this;
public SettingsPropertyValueCollection()
{
_indices = new Hashtable(10, StringComparer.CurrentCultureIgnoreCase);
_values = new ArrayList();
}
public void Add(SettingsPropertyValue property)
{
if (_readOnly)
throw new NotSupportedException();
int num = _values.Add(property);
try {
_indices.Add(property.Name, num);
} catch (Exception) {
_values.RemoveAt(num);
throw;
}
}
public void Remove(string name)
{
if (_readOnly)
throw new NotSupportedException();
object obj = _indices[name];
if (obj != null && obj is int) {
int num = (int)obj;
if (num < _values.Count) {
_values.RemoveAt(num);
_indices.Remove(name);
ArrayList arrayList = new ArrayList();
IDictionaryEnumerator enumerator = _indices.GetEnumerator();
try {
while (enumerator.MoveNext()) {
DictionaryEntry dictionaryEntry = (DictionaryEntry)enumerator.Current;
if ((int)dictionaryEntry.Value > num)
arrayList.Add(dictionaryEntry.Key);
}
} finally {
(enumerator as IDisposable)?.Dispose();
}
foreach (string item in arrayList) {
_indices[item] = (int)_indices[item] - 1;
}
}
}
}
public IEnumerator GetEnumerator()
{
return _values.GetEnumerator();
}
public object Clone()
{
return new SettingsPropertyValueCollection(_indices, _values);
}
public void SetReadOnly()
{
if (!_readOnly) {
_readOnly = true;
_values = ArrayList.ReadOnly(_values);
}
}
public void Clear()
{
_values.Clear();
_indices.Clear();
}
public void CopyTo(Array array, int index)
{
_values.CopyTo(array, index);
}
private SettingsPropertyValueCollection(Hashtable indices, ArrayList values)
{
_indices = (Hashtable)indices.Clone();
_values = (ArrayList)values.Clone();
}
}
}