roslyn

Using Roslyn, I would like to modify my C# code before the actual compilation. For now, I will just need something like: [MyAnotatedMethod] public void MyMethod() { // method-body } And based on the annotation, I would like to inject some code at the beginning of the method, and at the end of the method. I'm aware of PostSharp, but that's not what I would like. Is this possible to do with Roslyn? And if yes, could you give me an example? Here is a quick and dirty way of doing what you want. It's based on one of the above comments, which points to SebbyLive . It is just a proof of concept, I

Update 1: After Updating visual studio to version 2015 update 2 RTM the problem still exist. Update 2 patch available 4/12/2016 : Thanks to Patrick Nelson. a patch has been released You can download the patch here . Update 3 8/16/2016: Latest vs 2015 update 3 KB3165756 has the same problem do not update Version Used: Latest stable version on visual studio update 2 rc Disabled all my extensions and also restarted my all settings Steps to Reproduce: Install visual studio update 2 rc Create new project using asp.net mvc core template Debug the app Expected Behavior: To be able to debug the asp

I am facing a strange issue from roslyn compiler. Sometimes when I build the solution I face a strange issue in error list which does not let me build the solution. Here is the error: Severity Code Description Project File Line Suppression State Error Unable to copy file "D:\Sealogical New Website\SealogicalWebsite\packages\Microsoft.Net.Compilers.1.0.0\tools\csc.exe" to "bin\roslyn\csc.exe". Access to the path 'bin\roslyn\csc.exe' is denied. SealogicalWebsite Severity Code Description Project File Line Suppression State Error Unable to copy file "D:\Sealogical New Website\SealogicalWebsite

I looked at the source code at http://referencesource.microsoft.com/ , and it appears all the source code is in C#. I also looked at the source code for the new C# compiler platform ( Roslyn ), and it is also in C#. How is that possible? Is C# language compiler written in C#? Or am I missing something obvious? If C# compiler is written in C# then how does it work? The original C# compiler wasn't written in C#, it was in C and C++. The new Roslyn compiler was written in C#, but was initially compiled with the old compiler. Once the new compiler was done, it was able to compile its own source

After I have migrated my project from VS2013 to VS2015 the project no longer builds. A compilation error occurs in the following LINQ statement: static void Main(string[] args) { decimal a, b; IEnumerable<dynamic> array = new string[] { "10", "20", "30" }; var result = (from v in array where decimal.TryParse(v, out a) && decimal.TryParse("15", out b) && a <= b // Error here orderby decimal.Parse(v) select v).ToArray(); } The compiler returns an error: Error CS0165 Use of unassigned local variable 'b' What causes this issue? Is it possible to fix it through a compiler setting? What does cause

I've been taking a look to Roslyn CTP and, while it solves a similar problem to the Expression tree API , both are immutable but Roslyn does so in a quite different way: Expression nodes have no reference to the parent node, are modified using a ExpressionVisitor and that's why big parts can be reused. Roslyn's SyntaxNode , on the other side, has a reference to its parent, so all the nodes effectively become a block that's impossible to re-use. Methods like Update , ReplaceNode , etc, are provided to make modifications. Where does this end? Document ? Project ? ISolution ? The API promotes a

Create a solution with the following projects. A .NetStandard2.0 project, name it "1" A .NetStandard2.0 project, name it "2" Add a reference of project 1 in 2 A .Net4.6.1 console project name it "3" and add the nuget Microsoft.CodeAnalysis.CSharp.Workspaces v2.7.0 Paste in the follwing code into project 3 static void Main(string[] args) { string dir = Path.Combine(Environment.CurrentDirectory, "..\\..\\..\\"); string solutionPath = Directory.GetFiles(dir, "*.sln").First(); var msWorkspace = MSBuildWorkspace.Create(); Solution solution = msWorkspace.OpenSolutionAsync(solutionPath).Result;