使用不安全或非托管代码可以获得这种类型的异常.
An access violation occurs in
unmanaged or unsafe code when the code
attempts to read or write to memory
that has not been allocated,or to
which it does not have access. This
usually occurs because a pointer has a
bad value. Not all reads or writes
through bad pointers lead to access
violations,so an access violation
usually indicates that several reads
or writes have occurred through bad
pointers,and that memory might be
corrupted. Thus,access violations
almost always indicate serious
programming errors. In the .NET
Framework version 2.0,an
AccessViolationException clearly
identifies these serious errors.
In programs consisting entirely of
verifiable managed code,all
references are either valid or null,
and access violations are impossible.
An AccessViolationException occurs
only when verifiable managed code
interacts with unmanaged code or with
unsafe managed code.
