'宣言 Public Class C1KeyedList (Of TKey As System.IComparable(Of TKey), TItem As IC1KeyedItem(Of TKey))
'使用法 Dim instance As C1KeyedList(Of TKey,TItem)
public class C1KeyedList<TKey,TItem> where TKey: System.IComparable<TKey> where TItem: IC1KeyedItem<TKey>