There is needs to modify the problem of the layout in _layout.cshtml.

[daisukenishino]

Requirement

I implemented the improvements in the other project. I think that we should replace the current implementation that has room for improvement with this implementation.

see :

• Some screens do not support responsive design correctly.
  Some screens do not support responsive design correctly. MultiPurposeAuthSite#12
• When the screen size becomes smaller, then the left menu becomes too small.
  When the screen size becomes smaller, then the left menu becomes too small. MultiPurposeAuthSite#29
• If the compatibility mode (IE=5) is applied to IE11, the layout will be greatly collapsed.
  If the compatibility mode (IE=5) is applied to IE11, the layout will be greatly collapsed. MultiPurposeAuthSite#30