Editor doesn't handle conditional compilation symbol with netstandard or .net core

[natidea]

From VSFeedback | 484140

Create either a Netstandard or Net Core project and put this code in the class:

#if DEBUG
public static int I = 5;
#else
public static int I = 6;
#endif

Second statement (#else) will be correctly grayed out.
Change configuration to Release.

Expected: first statement is grayed out.

Actual: second is still grayed out.

Note: Sometimes it picks the change but then gets stuck again to that. Compiler works properly.

In general these changes are not reflected in the editor until you reload the project.

[EPinci]

Guy, this is a serious nightmare to work on with for everybody who's relying on compilation symbols.
It probably won't warrant a QFE for 15.3 but can you, please, reconsider it and bump it up to 15.4? Thank you.

[matiii]

In 15.4 still doesn't work

[MihaMarkic]

Milestone 15.6? Seriously? :(

[andreujuanc]

This should have gotten bigger priority. Unloading and Reloading a project just to change what compilation symbols are picked up is, as @EPinci said, a nightmare.

Just added my own debug symbols DEV, STAGE and PROD. What is that f..... automatically added DEBUG_* and RELEASE_* and how to turn that off? Thanks in advance.

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DefineConstants>TRACE;DEBUG;DEV;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug-PROD|AnyCPU'">
    <DefineConstants>TRACE;PROD;DEBUG_PROD;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug-STAGE|AnyCPU'">
    <DefineConstants>TRACE;STAGE;DEBUG_STAGE;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release-DEV|AnyCPU'">
    <DefineConstants>TRACE;DEV;RELEASE_DEV;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug-DEV|AnyCPU'">
    <DefineConstants>TRACE;DEV;DEBUG_DEV;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
    <DefineConstants>TRACE;PROD;RELEASE;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release-STAGE|AnyCPU'">
    <DefineConstants>TRACE;STAGE;RELEASE_STAGE;NETSTANDARD1_4</DefineConstants>
  </PropertyGroup>

[rollsch]

I stopped using netcore literally because of how annoying this is.

[MihaMarkic]

Guys, please don't pollute this topic, rather open a new one (@ericbrunner)
Update: changed typo guts to guys.

[rollsch]

Why would we open a new one? We are discussing how his issue seems to have been ignored despite it being something we have to manually correct every day.