Roslyn CSC.exe, Web API 2 on Hosting Server

Question

Hi there, I have been searching high and low for a solution to my challenge. I have recently upgraded to Visual Studio 2015, and I am using .NET Framework 4.5.2 for my Web API 2 project. I have done web api related projects previously on VS 2013, and everything works fine on the hosting environment. I am using GoDaddy.

Problem:

When I compiled and uploaded my web api project files to the hosting server, it tells me that there is a group policy error for executing the CSC.exe file within the Bin\roslyn\ folder.

In VS 2013, when we compile our projects, there is no such folder for "roslyn".

I have tried to read up about Roslyn but that doesn't seem to help me with my situation.

Is there anyway can disable roslyn in my project? I desperately need a solution to this problem.

Note: I am using a shared hosting environment. All my past projects have no issues (done with VS 2013).

Answer 1

Hello,

>>When I compiled and uploaded my web api project files to the hosting server, it tells me that there is a group policy error for executing the CSC.exe file within the Bin\roslyn\ folder

According to your description, the third party hosting server throw this group policy with the upgraded project. Have you tried a new project created in VS 2015 and can it throw error again? I would recommend you put your question on third party hosting server support channel.

Feel free to le me know if you have any concerns.

Regards,

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Answer 2

I also encountered this issue using Visual Studio Community with GoDaddy hosting. I was able to work around it by uninstalling the Roslyn package from my project. It's this package:

https://www.nuget.org/packages/Microsoft.CodeDom.Providers.DotNetCompilerPlatform

I haven't yet determined if there's any drawbacks to uninstalling it, but when I published the application to GoDaddy I no longer got the group policy error and everything appears to be working fine.

I don't know enough about the new platform to know if there's a hit from uninstalling it, but at least it's now working on GoDaddy. Here's more info that I'm continuing to read:

http://blogs.msdn.com/b/webdev/archive/2014/05/12/enabling-the-net-compiler-platform-roslyn-in-asp-net-applications.aspx

Best of luck.

Answer 3

I have noticed a minor drawback to uninstalling this package:

https://www.nuget.org/packages/Microsoft.CodeDom.Providers.DotNetCompilerPlatform

Some of the new C# 6.0 language features if used in Views (MVC project) will not compile.  Many of my views use the   ?.    null checking operator for accessing Model properties.  All of these views now return errors on my Godaddy hosted MVC 5 application.

This error occurs because Views (by default) are compiled at runtime using the .NET pipeline (not pre-compiled).

To resolve this issue, simply uncheck the "Allow precompiled site to be updatable" option in your publish profile settings.  This should pre-compile your views and allow your C# 6.0 (Latest version of Roslyn Compiler) to run like a champ.

Answer 4

This absolutely did the trick. Perfect!

-Thanks

Answer 5

awesome!!! spent half a day on this, you are the only one with a valid solution!!!!

Answer 6

After 2 days, search ended on your answer. thanks dear.

Answer 7

Somehow, in godaddy's "shared" server hosting, I still get the "group policy" vieolation security issue. :(

Could pre-compiling the web app fix the issue? 'haven't tried it, 'just thought to ask anyways, maybe some people will know.

Tx

Answer 8

Worked like a charm! Saved me from having to upgrade to "private hosting", as per GoDaddy tech support.



Answer 9

Nailed it, thanks!  

Answer 10

Hi,

I am getting same issue while deploying on GoDaddy. Do I need to uninstall Roslyn?

Answer 11

Hi,

I am getting same issue while deploying on GoDaddy. Do I need to uninstall Roslyn?

 I did it and worked like a charm!

Answer 12

I follow the same steps, but now when I navigate to site/api/apicontrollername I am getting 500 error.. whereas on local IIS server its work without any error.. 

Answer 13

csc.exe compiler error after publish

comment below in web.config

    <!--<compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>-->

Answer 14

Thank you much for the tip!

After my hours and calls to Go Daddy Support

A simple check mark does the trick

Answer 15

Great question and this site seems to be the only one with the correct answer.

Answer 16

thanks

Answer 17

I tried but its still the same

Answer 18

yes they are asking to upgrade to private hosting. I unchecked the "Allow precompiled site to be updatable" option in my publish profile settings. but still the same error

Answer 19

Great tips, Thanks