public static void CreateAssociation(object primary, object secondary)
{
if (primary == null)
{
throw new ArgumentNullException("primary");
}
if (secondary == null)
{
throw new ArgumentNullException("secondary");
}
if (primary == secondary)
{
throw new ArgumentException(SR.GetString(SR.TypeDescriptorSameAssociation));
}
if (_associationTable == null)
{
lock (_internalSyncObject)
{
if (_associationTable == null)
{
_associationTable = new WeakHashtable();
}
}
}
IList associations = (IList)_associationTable[primary];
if (associations == null)
{
lock (_associationTable)
{
associations = (IList)_associationTable[primary];
if (associations == null)
{
associations = new ArrayList(4);
_associationTable.SetWeak(primary, associations);
}
}
}
else
{
for (int idx = associations.Count - 1; idx >= 0; idx--)
{
WeakReference r = (WeakReference)associations[idx];
if (r.IsAlive && r.Target == secondary)
{
throw new ArgumentException(SR.GetString(SR.TypeDescriptorAlreadyAssociated));
}
}
}
lock(associations)
{
associations.Add(new WeakReference(secondary));
}
}
public static void CreateAssociation(object primary, object secondary)
{
bool flag3;
IList list2;
if (primary == null)
{
throw new ArgumentNullException("primary");
}
if (secondary == null)
{
throw new ArgumentNullException("secondary");
}
if (primary == secondary)
{
throw new ArgumentException(SR.GetString("TypeDescriptorSameAssociation"));
}
if (_associationTable == null)
{
lock (_internalSyncObject)
{
if (_associationTable == null)
{
_associationTable = new WeakHashtable();
}
}
}
IList list = (IList) _associationTable[primary];
if (list == null)
{
lock (_associationTable)
{
list = (IList) _associationTable[primary];
if (list == null)
{
list = new ArrayList(4);
_associationTable.SetWeak(primary, list);
}
goto Label_0103;
}
}
for (int i = list.Count - 1; i >= 0; i--)
{
WeakReference reference = (WeakReference) list[i];
if (reference.IsAlive && (reference.Target == secondary))
{
throw new ArgumentException(SR.GetString("TypeDescriptorAlreadyAssociated"));
}
}
Label_0103:
flag3 = false;
try
{
Monitor.Enter(list2 = list, ref flag3);
list.Add(new WeakReference(secondary));
}
finally
{
if (flag3)
{
Monitor.Exit(list2);
}
}
}
