Visual Studio 2015 crash on startup 啟動時閃退

Issue 問題:
Cannot open Visual Studio 2015, splash loading screen then crash.

無法打開 Visual Studio 2015，程式閃退。

Environment 環境: 

OS: Windows 7 x64

Visual studio: 2015


Solution 解決方式: 

Step 1. keep  SYSTEM PATH variables less than 2048 characters.
步驟 1. 清除 PATH 變數底下的字元，使其少於 2048個字元。

Step 2. remove Git Extension
步驟 2.移除 Git Extension
p.s. if you want to keep git Extension, ref to http://shades-of-orange.com/post/Visual-Studio-2013-Update-4-Crashes-On-Startup-It-Might-Be-GitExtensions-Fault
p.s. 如果想保留 Git Extension 可以參考網址 http://shades-of-orange.com/post/Visual-Studio-2013-Update-4-Crashes-On-Startup-It-Might-Be-GitExtensions-Fault

Step 3.open Visual Studio 2015 with "/resetsettings" to reset settings
步驟 3.使用重置命令 "/resetsettings" 來啟動 Visual Studio 2015

Ref 參考:
http://stackoverflow.com/questions/13337886/visual-studio-crash-at-the-start-up 
http://andydunkel.net/coding/2015/11/13/visual_studio_problem_occured.html
http://shades-of-orange.com/post/Visual-Studio-2013-Update-4-Crashes-On-Startup-It-Might-Be-GitExtensions-Fault