Hashtable 使用GetEnumerator() 时发生 System.InvalidOperationException类型错误

Hashtable 使用GetEnumerator() 时发生 System.InvalidOperationException类型错误

an exception of type System.InvalidOperationException is thrown if the collection is modified within a foreach loop, reporting that the collection was modified after the enumerator was instantiated.
因为枚举的时候改变了Hashtable集合.

http://mark.michaelis.net/Blog/TheInternalsOfForeach.aspx

http://support.microsoft.com/kb/815634/zh-cn

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