How do I append to a file using the COPY command

What about type file2 >> file1

Windows 8 x86:

Microsoft Windows [Version 6.2.9200]
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C:\Users\Nikos>echo foo>file1

C:\Users\Nikos>echo bar>file2

C:\Users\Nikos>copy /b file1 + file2 file1
file1
file2
        1 file(s) copied.

C:\Users\Nikos>type file1
foo
bar