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How do I enable prediction when writing C# codes in Visual Studio Code? [duplicate]

I just downloaded Visual Studio Code and my Intellisense is not automatically working.
The two settings that control this seem to be set correctly:
"editor.quickSuggestions": true,
"editor.suggestOnTriggerCharacters": true,
I do get an Intellisense menu when i start typing and press "CTRL + Space", but this gives me a list of everything and not things specifically for my object.
What am i doing wrong?

If you have a workspace and for some reason have multiple folders you may need to 'help' omnisharp a bit. I initially had a big project and added a solution for it further on - ending up with TWO workspace folders (one to a startup project and one to the solution). After composing that setup I experienced only the first project to have intellisense working.
Solution to get intellisense working was to make sure omnisharp worked its way from the solution instead of the project:
Ctrl + Shift + p
Write "OmniSharp: Select Project" and press Enter.
Choose the solution workspace entry.
Inspiration gotten from 'swaner':
https://github.com/OmniSharp/omnisharp-vscode/issues/1889

Visual Studio Code's more advanced editing features (IntelliSense, refactoring tools, etc.) only work in C# files if you have a project.json file or *.sln file that VSCode is aware of. Open the folder (i.e. open the File menu and click Open Folder...) with the *.sln file or project.json and VSCode will attempt to find all project/solution files in the folder. If there are multiple projects, you may need to select one from the projects button on the right side of the status bar (bottom of the window).
From the VSCode website:
Selecting a project.json-file is opening a DNX-project and VSCode will load that project plus the referenced projects
Selecting a *.sln-file is opening a MSBuild-project. It will load the referenced *.csproj-projects and sibling or descendant project.json-files but no other project files that are referenced from the solution file.
Selecting a folder will make VSCode scan for *.sln and project.json files and VSCode will attempt to load them all.

If you are start your project with c#, then some time you haven't download extension.
Process by written
Ctrl + Shift + p.
Write "OmniSharp: Select Project" and press Enter.
Choose the solution workspace entry.
Then enable the c# extension for "OmniSharp : Project".
Process by image

Downgrading to 1.23.9 of the C# VS Code extension fixed the intellisense for me. So if nothing else is working for you, perhaps try installing an older version of the extension (doesn't necessarily have to be that exact one I mentioned). You can do this by selecting this option in VS Code:

As of the 0.5 version I have found that I need to close and re-open my working files to get some new intellisense information to start working for my own files. This usually happens after I have a file open that needs to use type information from another file I just created. Until I close and re-open them (within the editor) the intellisense doesn't always work.
Hopefully this is something that'll get fixed as the app matures.

Inorder to make the intelligence working, the Visual Studio Code extension OmniSharp should be there along with Mono. When you open a project/solution folder, the OmniSharp gets the project dependencies from either project.json or from the dotnet solution file (if the project/solution created with other versions of visual studio).
So, when you look at the omnisharp's output window after immediately opening the project/ solution folder, you may see the following lines
Starting OmniSharp server at 2017-9-18 09:26:44
Target: /Users/{username}/Source/{Your Solution Folder}/{Your Solution
file}.sln
OmniSharp server started wth Mono
Path: /Users/{username}/.vscode/extensions/ms-vscode.csharp-1.12.1/.omnisharp/run
PID: 5808
post that, you may see couple of lines coming up like below,
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
Update project: {Your Project1 Name}
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
Update project: {Your Project2 Name}
....
they mean that your projects are getting recognised by OmniSharp Extension.
If you get any error message informing you about timeout, please get into the settings of the Visual Studio Code, and add a configuration override like the one below:
"omnisharp.projectLoadTimeout": 200
I know it is too long to wait for 200 seconds. But don't worry, this won't stop you anymore working with project files. But, remember that the IntelliSense will be automatically available once all the projects in the folder are successfully loaded.
Feel free to extend the Timeout setting since it will help you getting intellisense even-though you are not getting it immediately.
Here is another link with the same solution: https://github.com/OmniSharp/omnisharp-vscode/issues/1585
Hope my information helps you! Enjoy your VSCode!

This case was for an existing project that was working fine before. Opened via the vs code "recent" history.
For dotnet core. I opened my project's *.csprog file, made no changes, and saved it via the vs code editor.
As soon as I saved, all of the intellisense stuff starting working again in my other files within that project.

Another troubleshooting strategy to try if none of the above works out is uninstalling Mono, which is unnecessary anyways if you're using .NET Core. I also experienced a sudden disappearance of Intellisense after pulling changes to one of our enterprise repos that included an upgrade from ASP.NET Core 2.0 to 2.1. Strangely, at the same time, Intellisense was working fine in another C# project repo running ASP.NET Core 2.2.
For the project in question, I was puzzled to see successful logs for each reboot of the Omnisharp server as well as perfectly clean builds and runs. The puzzlement increased as I compared these Omnisharp logs to those from the 2.2 project and found them effectively identical.
Upon uninstalling Mono, the one detail that changed is how Omnisharp started. Now it boots up from a shell script located at ~/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/run. Previously, Mono itself was booting the server from the executable at ~/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/omnisharp/Omnisharp.exe.
Other troubleshooting I attempted in this instance though to no avail:
dotnet clean / Deleting bin and obj directories
Updating launch.json to point at the proper /bin/Debug/netcoreapp2.1 build
directory
Wiping my local nuget cache
Restarting Omnisharp
Uninstalling and reinstalling VS Code, as well as bumping back a version from 1.33.1 as the breakage coincided oddly with the March 2019 update
Uninstalling and reinstalling the C# VS Code extension, as well as bumping back a version from 1.19.0 given other users' reports of said version interfering with Intellisense for certain projects*
Adding a global.json file at project root to override default utilization of latest .NET Core SDK (mine was 2.2.105) and run instead using 2.1.302 in concert with the project's version
Wiping/rebuilding the project .sln file
Specs: VS Code 1.33.1, C# Extension 1.19.0, MacOS High Sierra 10.13.6.
*NB: As it turns out, in another .NET Core 2.1 project with the same issues in VS Code as described above, uninstalling Mono alone did not fix things. I also did wind up needing to bump back the C# extension to v. 1.18.0 to recover Intellisense. Weird.

The issue I had was OmniSharp was an older version. I set the flag to update to latest version in Settings.json file. This ensures the extension is always the latest version.
"omnisharp.path": "latest"
And restarted VS code. That fixed it for me.

Simply reinstall the extension and restart the VSCode/PC.

I use Task Manager and kill the Visual Studio Code process, then restart Visual Studio Code, the intellisense shows and fixed.

I've had some good experiences in C# with this extension so far:
https://marketplace.visualstudio.com/items?itemName=jchannon.csharpextensions
This extension traverses up the folder tree to find the project.json or *.csproj and uses that as the parent folder to determine namespaces.

Try "Install Extension" from command Pallete - probably if C# intellisense is not there:
https://code.visualstudio.com/docs/customization/colorizer

if intellisense in not working for react js or javascript or node js this solution will help for windows
uninistall type script by typing npm uninstall -g typescript
install specific version of type script that is 3.3 by typing npm install -g typescript#3.3
add the typescript location in vscode by navigating to file > Preferences > settings > here search for edit in setting.json then add this path "typescript.tsdk": "/Users/yourusename/AppData/Roaming/npm/node_modules/typescript/lib"
settings.json should look someting like this
{
"editor.suggestSelection": "first",
"vsintellicode.modify.editor.suggestSelection":"automaticallyOverrodeDefaultValue",
"typescript.tsdk": "/Users/yourusername/AppData/Roaming/npm/node_modules/typescript/lib"
}

I was able to fix this by changing the Api Compatibility Level from .Net Standard 2.0 to .NT 4.x. You can find this setting on Project Settings / Player.
After that, intellisense started working again.

This is because of C# extension issue.
Reinstall the extension will work.
https://code.visualstudio.com/docs/editor/intellisense
https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp

I fixed this with a multiple project solution in .net5 / .net core 3.1 by
opening each project (not the sln folder) in VSCODE. This then prompts to add the resources/ .CSX? files to the project; enabling intellisense, per project. Finally close that window and reopen the solution folder and all works as expected.
See image
Add VSCode assets

Downgrading to 1.23.9 of C# for Visual Studio Code (powered by OmniSharp).
https://i.stack.imgur.com/VrdJl.png

After trying several things I looked at the OmniSharp logs only to realize that because I had two different sln files in my workspace. It had picked up the “other” one and thus wasn’t working. I deleted it, reopened vs code, and all is well again.

For me I had been working without internet for a long time. It had previously been working but then stopped. I closed+reopened VSCode with a stable wifi connection and the Output tab in VSCode popped up, displaying the the extensions were re-installing. After that it worked!

in my case , the extension wasn't enabled

I just had this happen (this being no code completion suggestions appearing). What resolved it for me was changing the VSCode Editor package in Unity to a previous version and then back to the current version.
For me, this was going from 1.2.0 to 1.1.3 and then back to 1.2.0. I believe removing and reinstalling 1.2.0 would have accomplished the same.
Window > Package Manager > Visual Studio Code Editor

I know this is probably the most obvious answer. But I had enough dealing with VS Code ridiculous bugs. You should be focusing on code, not the buggy IDE. Their documentation doesn't make it easy either to debug.
Steps for complete uninstallation:
Save your personalization files such as keybindings.json,
Just put it on GitHub or something so whenever you need have trouble with VS Code you simply just need to go to GitHub and copy-paste it.
Uninstall VS Code completely
When you uninstalled VS Code, it doesn't erase your extension files and some old settings. This is the cause of the re-installation ended up the same. Horrible move VS Code. For the list of the files that you must delete, you can check out this answer.
Go to their website and install the new one.
I hope this helps some people who are already had enough with the VS Code ridiculous bug.

In my case, the issue was not with VS Code settings. The error was due to a corrupted TEMP path configured in my PC's registry user profile environment settings.
I got this error from Help --> Toggle Developer Tools --> Console
The error was flagged in the console when I opened a new typescript file.
Unable to write file c:\Users\XXX\AppData\Local\Temp;C:\wamp64\bin\php\php5.6.25;C:\vufind-3.1.2\install.php\09cf49d8-af5b-42e9-8194-43f5b566be0f'
Obviously this path was corrupted. After updating the environment variables in registry settings, the VS code IntelliSense started working. Checking the console is a good start to find the root cause of this issue.

Earlier intellisense was working for Angular in VS-Code but for some reason (which I don't know) intellisense stopped working. I had extensions installed i.e. Angular Essentials and Angular Language Service etc. that were responsible for this intellisense and all that.
What I did?
I disabled the extensions, restarted VS Code and enabled them. It was all working fine as before.

If everything in VSCode is working ( No errors in output console, language server is working etc.) and built-in extensions are enabled. Still, if your IntelliSense is not working for normal .js files make sure variables are defined with a type identifier such as var d = new Date() or let d = new Date(). In my case, IntelliSense was not working for d = new Date() (No autocomplete for Date object 'd' APIs in this way) but started working fine when I specified a type before my variable names.

Download and install "Tool for Visual Studio 2019" as the C# extension under hood use the build tools: https://visualstudio.microsoft.com/downloads/

In my case, I had an extension installed (Explorer Exclude) to help me focus and hide certain files that I don't regularly work with within the Explorer.
I so happened to have disabled viewing *.sln, *.csproj and *.vsconfig files and folders, which apparently prevents VSCode from even knowing the file is there in the first place. Disabling these specific rules solved the problem instantly.
Took me ages to figure out... The more you know.

I solved it by uninstalling all SDK's (not sure if this is needed)
and installed 4.7.1 developer pack
win 10, vscode 1.63.2, unity 2020.3.25f1

I fixed this by installing .NET Framework 4.7.1 Developer Pack:
https://dotnet.microsoft.com/en-us/download/dotnet-framework/net471

Updating application using msi fails to update dll project reference

I am creating a setup msi using a Project Output (Say Project-A), which refers another project (Say Project-B).
When i update application using new msi, dll of Project-B does not get updated though latest build contains some changes in Project-B
Note: When i uninstall the application, dll of Project-B remains in installation folder( not deleted).

It's not clear what you mean by "update ... using new msi" but the way you upgrade using Visual Studio installer projects is to increment the setup project's version and accept the changes, which include generating a new ProductCode. RemovePreviousVersions also needs setting to true. This should help and is still relevant:
https://www.simple-talk.com/dotnet/visual-studio/updates-to-setup-projects/
In addition you must increment the file versions of files you need replacing - it's not enough that they are just different.

XSockets throwing InvalidOperationException on GetExport<IXSocketServerContainer>

I'm running into a weird issue. I have exactly the same code. On one machine, it works flawlessly. On the other, It throws a InvalidOperationException on GetExport<IXSocketServerContainer>
The offending line is:
_serverContainer = Composable.GetExport<IXSocketServerContainer>();
Here's a screenshot of the exception as well: screenshot.
Any ideas?
The only difference I can think about are that one machine is Win 8, and the other is Win 7.
Further details: took the solution that worked (win 8), copied as is to other machine (win 7), clean all packages, reinstall all nuget dependencies, went over all project adding or reimporting the dependencies, still now working (on the win 7 machine), though the project will build without errors.
Took that non working (yet compiling) project back to the first machine, and it won't work on that machine either. Utterly out of ideas.

Ok, Seems this was off the bat ...
It has nothing to do directly with XSockets.
What happens is a (known?) difficulty (read: bug) in VS.
Project A (.exe) includes project B (.dll).
Project B has dependencies that will be copied to it's output directory.
Project A will not get the dependencies that project B needs, and will burn and crash at runtime.
Solution:
Create a Post build event for the project (project properties -> Build Events) that looks like
copy /y source target
You probably want to have double quotes around your source and target, to avoid failing if they contain spaces.
You want the /y to overwrite files in the target.
You might need to play a bit in order to get the right syntax as well:
copy /y "$(ProjectDir)..\project_b\$(OutDir)some_mask.dll" "$(ProjectDir)$(OutDir)"
Related links:
Visual Studio Post Build Event - Copy to Relative Directory Location
Copy file(s) from one project to another using post build event...VS2010
Copy bin files on to Physical file location on Post Build event in VS2010
VS BUG:
https://connect.microsoft.com/VisualStudio/feedback/details/694561/copy-local-private-true-private-on-a-project-reference-needs-to-also-copy-what-the-target-project-marks-as-copy-local
Addendum:
It seems that in addition to the above, if you run XSockets from a folder that has # (sharp, or hash character) in it's path ... the server is going to throw the above exception as well.

The reason for this is that we use the following method to locate the assemblies.
public static string GetAssemblyDirectory()
{
return HostingEnvironment.IsHosted
? HttpRuntime.BinDirectory
: Path.GetDirectoryName(new Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath);
}
So, since we use:
new Uri(...)
the "#" will be removed and the path will not find the assemblies, and then you will get the "Sequence contains no matching elements..." exception.
However, it should work if you add the path manually before using the plugin framework... Something like.
Composable.AddLocation(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
You can ofcourse add any location, this "sample" would load all assemblies/exe in the bin folder of the executing assembly/exe
In 4.0 we will use the way described above and skip the "new Uri(..)" stuff.
Let me know if you have any issues.

Repair set up option in setup installation?

I made a setup file for c#.net application and installed it now when I restart the setup it is showing me the following error:
Another version of this product is already being installed. Installation of this version can not continue.
I want to create a setup with repair a option and somewhere I read that this repair option is provided by default then why I am not able to get that?
Need help, thanks.

What type of setup project have you used?
If you want your installer/setup to overwrite existing installation then you must increase the version number, every time you build installer project.
Version number consists of 4 parts 0.0.0.0 (Major Version, Minor Version, Build Number, Revision Number) but windows installer consider only first 3 parts so, make sure to increase the build number, every time you build a new installer.
If you run the same installer after installation was already completed successfully then it will ask you to remove the installation but if the installer is new but with same version number (you rebuild the installer project but did not change the version number) then you will get the in question message.
Select setup project in Visual studio > F4 > change the Version number (increase the build number by 1)

You can set the ARPNOMODIFY and ARPNOREPAIR properties

Cant see the Recent updates after Replacing Existing files in setup project

I have created a setup project for Windows Application . I have set following property to replace the existing version with the new version.
RemovePreviousversion=True;
Productcode=change;
But when I run exe from new installed version. I cannot see my new updates. It gives me the output of previous version!
The whole Explanation is Here
I have RemovePreviousVersions set to TRUE and InstallAllUsers set to TRUE.
When I need to do a new release, I update the Version field with a new version number in the installer and VS prompts me to update the product code, to which I answer YES. I have verified that it does indeed change the product code, but the package code also gets changed with it (verified by diffing project files using sourcesafe).
The UpgradeCode never changes between versions.
My version number changes are of the form: "1.1.2" -> "1.1.3" for example (just in case that has anything to do with it).
So only 3 fields are different between builds: ProductCode, PackageCode, and ProductVersion.
When I've done all that, I build the installer.
When I install the new version (I always install for all users and always into the same directory), I have seen three different results at various times:
It will appear to in install the new version, but I really end up with the old files still there (and one instance in the add/remove programs).
I end up with 2 instances of the app in the add/remove programs, both with the same name, and both pointing to the same directory.
It will uninstall the old one first and then install the new one (what it is supposed to do).
It is very frustrating to explain to users that to be safe, they have to uninstall the old manually before installing a new release because I have to tell them "it doesn't always uninstall the old one like it is supposed to".
Any suggestions? Why isn't this working? What am I missing here?

I Found answer.
Also need to change AssemblyVersion and AssemblyFileVersion in AssemblyInfo.cs