Dos set directory with quotes not working

I am trying to achieve this:

set MINIFYEXE = "C:\Progra开发者_运维百科m Files (x86)\Microsoft\Microsoft Ajax Minifier\ajaxmin.exe"
echo %MINIFYEXE%

Expected is:

"C:\Program Files (x86)\Microsoft\Microsoft Ajax Minifier\ajaxmin.exe"

Output is:

ECHO is off.

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Try removing the spaces before and after the equal sign in your SET statement:

set MINIFYEXE="C:\Program Files (x86)\Microsoft\Microsoft Ajax Minifier\ajaxmin.exe"