asp.net - mvc 6 IApplicationEnvironment causes blank page -

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i have asp 5 mvc 6 project , added iapplicationenvironment controller , of sudden going action in controller returns blank screen, 500 error can see in development tools

readonly dbdatacontext _dbcontext; readonly iapplicationenvironment _appenv;  public contactcontroller(iapplicationenvironment appenv, dbdatacontext dbcontext) {     _dbcontext = dbcontext;     _appenv = appenv; }

does have ideas why might happening?

thanks!

i figured out - because had microsoft.framework.runtime instead of using microsoft.extensions.platformabstractions; @ top of controller. using second 1 made work fine.


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