c# - "Cannot resolve symbol 'system'" and other namespaces when using ASP.NET 5 in VS2015 Community -

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in vs2015 community, when create asp.net 5 project, many errors namespaces , i'm not sure why is.

i have downloaded vs2015 community , have downloaded microsoft asp.net , web tools 2015 (beta8) , followed install instructions on web tools beta8 page , installed .net version manager (beta8) prior web tools. in vs2015, click on new project, go web within visual c# section , select "asp.net web application". select "web application" template within asp.net 5 preview templates. creates project. can start debugging click on green play button "iis express" text , page loads in web browser should. however, of namespaces flagged '"cannot resolve symbol". have tried uninstalling , reinstalling , has not worked. in solution explorer, have 2 references, dnx 4.5.1 , dnx core 5.0 , these have fair number of references within those. noticed dnx 4.5.1 has "framework assemblies" containing microsoft.csharp, mscorlib, system , system.core.

the same issue occurs when select "empty" asp.net 5 preview template

images: what startup.cs looks in vs2015, references in solution explorer

i had same issue. problem in resharper, cannot resolve namespaces using new asp.net 5 namespaces approach (using project.json) have installed latest version of resharper (9.2), supports asp.net 5 , issue resolved.


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