I've had this problem since this morning and have tried various options, but haven't found a solution to my problem yet.
The problem is that every time I want to start my Blazor web application I get this error message:
I tried several ways to solve this problem, however all I found was for IIS-Express with this problem.
I use several startup projects, and I don't find any solution for my problem.
I had the same problem this morning after updating the Microsoft packages in my WASM-project. Updating Microsoft.AspNetCore.Components.WebAssembly.DevServer 6.0.8 to 6.0.9 resulted in the error mentioned. Updating to .NET 6.0.109 SDK solved this. So in general: after updating the DevServer package you need to be sure you have the corresponding .NET SDK version (or higher) installed.
I'm using VS 2022 17.4.0 preview 1.0.
After I installed Visual Studio again it worked.
Just do this steps:
Close Visual Studio.
Navigate to the sub-folder of Project's main folder.
Delete .vs folder and open project again in Visual Studio and RUN
if don't work
just click on build button in app bar in visual studio then click on Rebuild Solution and run
This solved it for me
https://www.codeproject.com/tips/1029540/solved-process-with-an-id-of-is-not-running
Open the .csproj file, and remove tags DevelopmentServerPort, DevelopmentServerVPath and IISUrl.
Had an same issue when testing a Blazor app, it fixed after restored the package Microsoft.AspNetCore.Components.WebAssembly.DevServer from 6.0.8 to 6.0.5
Had the same issue. Updating Visual Studio and the .NET SDK fixed it for me. I had SDK version 6.0.302 installed and updated to SDK version 6.0.400.
I had this issue with code I downloaded from GitHub. The projects targetted .NET Core 3.1 which I hadn't installed. To solve, I double-clicked Properties in each project, and changed the Target framework to .NET 6.0.
Related
I have problem with my Visual. When I tried to create ASP.NET project, visual studio doesn't see any files in project. I see only No solution(0) . I create project in the same way like in this topic : Why my latest version Visual Studio 2022 does not contain any project under the solution in the Solution Explorer
I Tried to reinstall visual about 6 times. I don't know where is the problem.
the problem is that you are trying to use a version project framework that you don't installed yet.
it's seems to be that the solution is format and reinstall windows, easy ;)
So I recently installed visual studio code and added the C# available extensions. I also installed the Unity Debugger but it won't work because "it depends on an unknown 'ms-vscode.csharp' extension", I tried searching for this 'ms-vscode.csharp'in the extensions bar but found nothing. whenever i open a C# file from Unity or from any folder it recommends me to install that uknown C# extensions. what can i do please? here is a picture of the message:
To manually install the correct c# extension, do the following:
Uninstall existing vscode C# plugin
Close vscode
Download the vsix 1.21.12 from here
Open a command line in the folder where the vsix is.
Type: code --install-extension .\csharp-1.21.12.vsix
You should see:
Installing extensions...
Extension 'csharp-1.21.12.vsix' was successfully installed.
Open VSCode and in the C# output window, you will see:
Installing C# dependencies...
Platform: win32, x86_64
Downloading package 'OmniSharp for Windows (.NET 4.6 / x64)' (32544 KB).................... Done!
Validating download...
Integrity Check succeeded.
Installing package 'OmniSharp for Windows (.NET 4.6 / x64)'
Errors should now have gone away.
That was a mistake by Microsoft. I just spent hours to solve the problem and noticed that actually the name of the plugin was recently changed, leading to the error. We can fix it by manually downloading a previous version of the plugin.
Link:https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp&ssr=false#review-details
I don't do Unity development, but this may help: https://code.visualstudio.com/docs/other/unity
Keep in mind that VSCode is only going to be an editor for your project files.
(Can't comment, apologies for the brief answer)
I delete [.vscode\extensions], swith to 1.21.1/February 2018 and then update to 1.42.1. It finally works fine!
Maybe System setup doesn't have the problem. It only occurs on User setup.
That error happens because microsoft changed marketplace publisher from ms-vscode to ms-dotnettools. Mentioned here on github. You can just install the version v1.21.18 and that should solve it.
I had a VS2015 solution with a C# and python project in it. Now I upgraded visual studio to "2017 community preview" version.
If I try to open the solution from Visual Studio by clicking on File/Open/Project... it pops up the following error message:
Unsupported. After that VS cannot open the python project in the solution (it sais "incompatible" next to the project file). It can open the C# projects.
But if I simply double-click on the *.sln file, VS automatically starts up and offers the following one-way upgrade: One-way upgrade. After doing the upgrade it can open the python project as well and everything works properly.
Even though after making the one-way upgrade the first type of opening (from VS) still does not work. Opening by clicking on the solution file still works.
Thanks for any help how I can resolve this issue.
Python tools for visual studio 2017 is only available for the preview version. It will be added soon to the non-preview version.
source: https://blogs.msdn.microsoft.com/pythonengineering/2017/03/07/python-support-in-vs2017/
OMG, I got the answer...
I had both VS 2017 community and VS 2017 community preview installed on my computer. (That is because obvously I installed the simple community version at first, and only installed the other when I realized it does not support python.) I did not either think that preview version will not overwrite the existing one but will make a new install.
So when I click on the sln file it opens up with the preview version of VS, but the shortcut in my start menu refers to the normal version... :S :D
I cannot debugg Asp.Net 5 project in my Visual Studio 2015. First when I open app I get message box with information:
Cannot find DNX SD version 'dnx-clr-win-x86.1.0.0-beta3'.....'dnx=clr-win-x86.1.0.0-bet5' will be used as the solution DNX SDK version for this session.
Then when I click Start to debbug app I get alert box:
The debugger cannot continue running the process.Unable to start debugging.
Even when I create new project -> Asp.Net 5 preview template -> web application the behavior is the same. When I was using CTP version of VS 2015 everything worked but I had to change to VS 2015. I also cheked PowerShell version and it's 4.0.
I have no Idea what could be the reason. Any help appreciated.
I think you need to install the correct DNVM,
you can read about it here.
Or change versions of packages that you use.
Put in cmd:
dnvm list
look what SDK version is default and then set in global.json and project.json same version.
I have a visual studio 2010 Ultimate SP1 using a solution where two of my .csproj projects will not open. The error i get is the project type is not supported by this installation.
It's not a problem with the solution as these projects open with no issue on all other workstations.
My project type guid's are and seem to be the same for both projects that are unavailable within the solution:
{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
I checked all of my prerequisites and they seem to be installed correctly. I noticed when opening up visual studio sometimes the license name is different. I'm wondering if there could be a conflict with a previous install? Any suggestions would be helpful.
Thanks.
It looks like your missing Portable Library tools. Are you sure it's installed?
If not, http://visualstudiogallery.msdn.microsoft.com/b0e0b5e9-e138-410b-ad10-00cb3caf4981
The reason of the issue is that you're trying to open a project where it's template is not installed in your VS 2010. For example by default VS2010 has no MVC3, MVC4, and Silverlight 5 templates. You need to install them if you want to open their project types.
To download MVC3 or MVC4 installers visit http://www.asp.net/mvc