ProviderCollection
Represents a collection of provider objects that inherit from ProviderBase.
using System.Collections;
namespace System.Configuration.Provider
{
public class ProviderCollection : ICollection, IEnumerable
{
private readonly Hashtable _hashtable;
private bool _readOnly;
public ProviderBase this[string name] {
get {
return _hashtable[name] as ProviderBase;
}
}
public int Count => _hashtable.Count;
public bool IsSynchronized => false;
public object SyncRoot => this;
public ProviderCollection()
{
_hashtable = new Hashtable(10, StringComparer.OrdinalIgnoreCase);
}
public IEnumerator GetEnumerator()
{
return _hashtable.Values.GetEnumerator();
}
void ICollection.CopyTo(Array array, int index)
{
_hashtable.Values.CopyTo(array, index);
}
public virtual void Add(ProviderBase provider)
{
if (_readOnly)
throw new NotSupportedException(System.SR.CollectionReadOnly);
if (provider == null)
throw new ArgumentNullException("provider");
if (provider.Name == null || provider.Name.Length < 1)
throw new ArgumentException(System.SR.Config_provider_name_null_or_empty);
_hashtable.Add(provider.Name, provider);
}
public void Remove(string name)
{
if (_readOnly)
throw new NotSupportedException(System.SR.CollectionReadOnly);
_hashtable.Remove(name);
}
public void SetReadOnly()
{
if (!_readOnly)
_readOnly = true;
}
public void Clear()
{
if (_readOnly)
throw new NotSupportedException(System.SR.CollectionReadOnly);
_hashtable.Clear();
}
public void CopyTo(ProviderBase[] array, int index)
{
((ICollection)this).CopyTo((Array)array, index);
}
}
}