The CodeDom provider type “Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider …” could not be located

Question

I published my website using visual studio publish option to my host.

my host uses asp.net 4.5.1 framework.

it works fine in local but after I published it, it gave this error.

my local visual studio solution folder contains a folder named packages and it contains some files is it related to error?

This is my config file(other lines omitted for the sake of clarity):

Thank you.

Answer 1

The assembly version in the bin folder must match the version indicated in the compilers section of web.config file.

This error happens to me when i update the server bin folder. Because the package Microsoft.CodeDom.Providers.DotNetCompilerPlatform was updated i needed to update the compilers section of web.config too.

It can be done by simply updating the version attribute on the below example or replacing by entire section with the developer version.

<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>

Doesn't require IIS restart.

Answer 2

Please go to Project > Properties. in "Package/Publish Web" tab and in "Items to deploy(applies to all deployment methods)" section and select "All files in this project folder" from drop down list and then Publish your Web Application again,

Hope Helpful.