'宣言
Public MustOverride Function GetEnumerator() As System.Collections.Generic.IEnumerator(Of IndexedGroup(Of TKey,T))
public abstract System.Collections.Generic.IEnumerator<IndexedGroup<TKey,T>> GetEnumerator()
'宣言
Public MustOverride Function GetEnumerator() As System.Collections.Generic.IEnumerator(Of IndexedGroup(Of TKey,T))
public abstract System.Collections.Generic.IEnumerator<IndexedGroup<TKey,T>> GetEnumerator()