Same problem here – solution for me was closing VS, open task manager and end all instances of VBCSCompiler.exe as mentionend here: https://developercommunity.visualstudio.com/content/problem/71302/binroslyn-files-locked-during-build.html
Visual Studio Code Analysis has been merged with Intellisense and can now be viewed from the Error window. When you select “Build+Intellisense” or “Intellisense” your code analysis warnings will show up there. You no longer need to build your solution to see them there. This is one of the perks of the new Roslyn based … Read more
For the closed file issues, it’s our intent that all diagnostics will be reported, from either open or closed files. There is a user option for it in the preview at Tools\Options\Text Editor\C#\Advanced that you can toggle to include diagnostics in closed files. We hope to make this the default before VS 2015 is released. … Read more
This is taken from MSDN forum. https://social.msdn.microsoft.com/Forums/vstudio/en-US/442b100a-2b88-4ac4-b655-0c1345791f15/roslyn-cscexe-web-api-2-on-hosting-server?forum=msbuild 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 … Read more
I didn’t have any foreknowledge of this, but since Roslyn is open-source these days, we can go hunting through the code for an explanation. And here, on line 60 of the AsyncRewriter, we find: // The CLR doesn’t support adding fields to structs, so in order to enable EnC in an async method we need … Read more
I’ve just faced the same problem. When you create a new web project, two nuget packages automatically added to your project. If you remove them, your problem should be solved. Package names are: “Microsoft.CodeDom.Providers.DotNetCompilerPlatform” and “Microsoft.Net.Compilers“.
What does cause this issue? Looks like a compiler bug to me. At least, it did. Although the decimal.TryParse(v, out a) and decimal.TryParse(v, out b) expressions are evaluated dynamically, I expected the compiler to still understand that by the time it reaches a <= b, both a and b are definitely assigned. Even with the … Read more
I think that you should reference the Microsoft.CSharp.dll assembly
Make sure you call: C:\Program Files (x86)\MSBuild\14.0\Bin\MsBuild.exe That’s the version of MsBuild that ships with Visual Studio 2015 and calls the C# compiler that understands this. You can get this version of MsBuild on your system by installing any edition of Visual Studio 2015 or by installing the stand-alone Microsoft Build Tools 2015. Adding a … Read more
Disclaimer: I work for Microsoft on the Roslyn team. CodeDom is a precursor to Roslyn, but is only marginally related. Essentially, CodeDom is a simple and (somewhat) langage agnostic way to generate code that was added in .NET 1.0 to support designers (a la WinForms). Because CodeDom was an attempt at providing a unified model … Read more