关于反射的效率问题

each type and member. This means that reflection is constantly performing string

Chapter 22: Assembly Loading and Reflection 555

searches as the types in the System.Reflection namespace scan through an assembly"s

metadata. Often, the string searches are case-insensitive comparisons, which can slow

this down even more.

Invoking a member by using reflection will also hurt performance. When using reflection to

invoke a method, you must first package the arguments into an array; internally, reflection

must unpack these on to the thread"s stack. Also, the CLR must check that the arguments are

of the correct data type before invoking a method. Finally, the CLR ensures that the caller has

the proper security permission to access the member being invoked.

For all of these reasons, it"s best to avoid using reflection to access a member. If you"re writing