Essentially I was upgrading VS studio last night and had a power cut, any time I open VS studio I get "Assembly CSharp(failed to load)", I've tried everything in this thread
Missing vc_runtimeminimum_x86.msi and installation won't work
I'm just a bit lost with what my solutions are as I need to use vs quite soon.
See image below for error i get whilst installing
https://imgur.com/a/BgRU949
I'm learning C# through video tutorials by Bob Tabor on MSDN's Channel 9. Whenever the instructor(Bob Tabor) hit the Start button(to compile and run), the result console window immediately appeared for him... but it (first compilation only) is taking atleast 20-30 seconds for me...
I have the latest Visual Studio 2017 Community Edition on my Core i7 4th Gen laptop with 8 GB Ram.
Few days ago, I came to know that deleting %temp% folder will speed up launching of Visual Studio, and it worked for that purpose.
But, I'm not able to solve this slow first compilation problem... all subsequent code changes are compiled and run super fast... I'm guessing that there is a fix for this... I'd appreciate if someone can point me in the right direction.
try this as it worked for me
open run from start
type %temp% and delete everything from there...
open Run again and type prefetch and delete everything from there also.
now open VS and see the performance
Iv'e had that problem for long time and then I found the solution of disabling visual studio hosting process or enabling native code debugging every time in the properties of the project,but its been really annoying and I don't even know if I need those functions and dose it hurt my projects so I want to know if there is a solution without doing it every new project and will not have negative effect on my projects,using Visual studio 2012 express and win7 64bit.
thank you for the help.
I have .net application (GUI as well as PowerShell) built against 4.5. My OS is server 2012. When I attach my application to 2013 visual studio, the debugger is not working sometimes. Its not evaluating expression or showing locals (and also watch window/immediate window nothing works - its as if the project is build with release). But I have build with 'Debug' configuration. And as mentioned same thing works when I simply attach with VS 2012 ( yes, I have 2k13 and 2k12 SXS)
Please note that if I attach the same process with the same settings (managed debugging), to Visual Studio 2012 it always works.
I made sure the symbols are loaded (by checking modules tab in visual studio + debug + windows), break points are hit.
Any thoughts on what might be the issue? All the updates are up-to-date as well.
Its kind of annoying to launch vs 2012 just to debug, when I am using VS 2k13 IDE for development.
Regards!
If you are facing the same issue, please look at http://weblog.west-wind.com/posts/2013/Nov/21/Visual-Studio-2013-Could-not-evaluate-Expression-Debugger-Abnormality for details.
Here is the answer which solved for me:
I have set the flag "use managed compatibility mode" in Tools | Options | Debugger | General.
For details, take a look at the link as he explained it nicely as a story :)
Am happy it worked, otherwise I just had to load project in vs 2k12 just to debug it which is annoying.
EDIT on 12th June 2014
I have updated my dev environments with visual studio 2013 update 2 (http://www.microsoft.com/en-us/download/details.aspx?id=42666) (as per Maria's suggestion below) and removed "using managed compatibility mode". I will be testing my apps (ps cmdlets, gui, services) and update you in couple of weeks if the debugger is ok for me.
EDIT on 26th June 2014
I have tested my apps and luckily for me everything is working nicely :). Even the debugger is doing pretty good job with new async/await model. So, see if you can upgrade to 'update 2' - hopefully this works in your environment too?. Thanks to Maria and debugger's team!
Regards.
I deleted all my breakpoints and then it started working, with Visual Studio 2013 Update 1. This was one of the suggestions from the blog post mentioned by Dreamer.
We have released a fix for the issue you are describing in Update 2 CTP 2 of Visual Studio -
Please let me know if that doesn't resolve your issue!
Thanks!
Maria - Visual Studio Debugger
Please note that while the accepted answer probably will fix the problem for now, it's best to be aware of the drawbacks of this solution. Making this change will make VS 2013 use the older style debugger for all you projects. It is a global setting. There are other ways to locally change this for a single project. Please read here for more info on this:
http://blogs.msdn.com/b/visualstudioalm/archive/2013/10/16/switching-to-managed-compatibility-mode-in-visual-studio-2013.aspx
We have a custom expression evaluator and our own language and this warning message to change the settings always appears even after I change the project settings to those specified in the blog.
<DebugEngines>{351668CC-8477-4fbf-BFE3-5F1006E4DB1F}</DebugEngines>
Is there something else?
Our clients are using VS2013 pro. I've turned off all the "Enable the Visual Studio hosting process" for all our projects and also added the property to our clients projects. I still see the warning each time I attack to w3wp.exe.
IMPORTANT NOTE: If your project is using the Visual Studio hosting process (the default for many project types), you must disable the hosting process for this fix to correctly change the debug mode. To disable the hosting process go to the Debug pane on the project properties page, and uncheck "Enable the Visual Studio hosting process"
You can resolve this error by applying below points
Sol 1:
1) Restart visual studio and re-open your project.
2) Open your project bin directory and delete DLL of that code where your debugger is not working properly.
3) Then again add DLL reference in the bin directory.
4) Remove all breakpoints.
5) Build project.
6) attach with one w3wp.exe process in attach to process window
7) Enjoy your problem has been resolved.
If above solution is not working then you can try solution that has been provided on bellow link
http://weblog.west-wind.com/posts/2013/Nov/21/Visual-Studio-2013-Could-not-evaluate-Expression-Debugger-Abnormality
I had a similar problem debugging where this error occurred from a return from creating a class. The class initialized fine (using "new classname()") but then it gave the "cannot evaluate expression" error on the return. Though it worked on previous visual studio versions, running on VS 2017 it crapped out.
After a lot of head banging, it turned out that private variables in the class, especially things like arraylists and other classes, needed to be declared with initial values, even if set to null.
Once that was done, everything worked, even though the solution "appeared" to have nothing to do with the problem and gave no apparent clue of where the problem occurred.
We had this problem with PostSharp extension version 5.0.32 with VS2013 Update 5.
Our workaround was downgrade PostSharp extension to version 4.3.19 or disable it.
Set AutoEventWireup="true" on aspx header file. This will turn debug mode on.
I had Visual Studio 2010 installed on my Windows 7 desktop, that I was using primarily to debug ASP.NET solutions. Everything was working great, until one of the Windows updates installed a new version of the .NET Framework. Now I get the following message when I try to place a breakpoint and then do a "debugger step" in my C# code:
To make matters worse, it doesn't happen all the time. I tried to find any pattern, but the best way I can describe it is sporadic.
Any idea how to fix this?
I just got this in Visual Studio 2015. I was debugging on a separate thread, hit the breakpoint but could not continue. A reboot did not fix it.
I deleted all of my breakpoints, reset the two that I actually wanted and it works!
Can I suggest you try using the resharper test runner. I have also been hitting this error a lot in VS2017 15.5.2 I have found its something to do with the VS test system.
Even though this solution is a product recommendation (I don't work there) it solved my issue and I was able to get things debugged.