Develop Reference

C# LSP autocompletion client for neovim / vim8

I've tried several ways to make it work but there seems to be no easy way. Yes, there are a ton of plugins, configurations. But they do not work right as per Oct 2019.
OmniSharp-Vim client needs configuration, it covers only C# and it lists plugins integration that does not work anymore (try choosing it for linting in ALE).
YouCompeleteMe should work but it is large and seems bloated.
Deoplete don't have source for C# and configurations I found are out of date.
Coc.nvim does not even list C# and 'unofficial' configurations have issues (like this). Besides Coc.nvim seems to be an alien from VS Code.
LanguageClient-neovim I didn't find sensible configuration and it seems because C# LSP server needs .sln file.
So this seems that csharpers should go to VS (or Rider) and that is when MS proposed LSP. How do you make IDE like from nvim to work with C#?
Basically the client should start server like this and use LSP.
~/.cache/omnisharp-vim/omnisharp-roslyn/run -s <PATH TO SLN OR DIR>

I just got omnisharp / ale working successfully with a clean install. You may want to completely uninstall omnisharp (~\AppData\Local\omnisharp-vim or ~/.omnisharp) just in case you have old versions.
You didn't mention your OS; I have this working in both Windows 10 and Mac OS. If you're using Mac OS make sure you brew install libuv first.
My Environment
Windows 10 (v1903) and Mac OS 10.14.6
Vim 8.1.2244
dotnet core 3.1 - I'd expect 3.0 to work as well
Instructions
First off, I'm using vim-plug as my plugin manager to handle installation. I installed it in both Windows and Mac OS using the bash/powershell snippets in vim-plug's README.
Then I added the following to my vimrc (~\_vimrc on Windows, ~/.vimrc on Mac OS):
"vim-plug config
call plug#begin()
Plug 'OmniSharp/omnisharp-vim'
Plug 'dense-analysis/ale'
call plug#end()
" plugin config
let g:OmniSharp_server_stdio = 1
Restart vim, and run :PlugInstall. It will clone omnisharp and ale for you.
Next, find some C# solution, and ensure the solution builds at the commandline (e.g. dotnet build should complete without errors). You also need a SLN file if you don't already have one (dotnet new sln and then dotnet sln add MyProj.csproj)
Choose a C# file and open it in vim. You should see the following notification:
If the install doesn't autostart, you can start it with :OmniSharpInstall. The install takes a minute or two of downloading in a terminal window. After the installation is complete, reopen vim and execute :cd \path\to\my\solution to ensure the working directory inside vim is correct. Then open a file with e.g. :e MyProj\Program.cs.
The server will be started automatically; don't manually start it. I get a lot of syntax errors for the first few seconds while the server is starting, after that I don't have any errors.
To pull up the autocomplete, type something like Console. then hit Ctrl-x o:
The above screenshot has vim-airline for the bottom bar -- that's not part of omnisharp and isn't required.
The above screenshots are Windows, but it's also working fine in Mac OS:
My full vimrc is available here and the source code I'm testing with is available here.

So far here is my setting for this using Deoplete, OmniSharp and ALE (full config at https://github.com/artkpv/dotfiles/blob/master/.config/nvim/vimrc) :
" Install Deoplete and OmniSharp:
" - OmniSharp/omnisharp-vim " for LSP support (like start OmniSharp server) and code actions, etc
" - Shougo/deoplete.nvim " for better autocompletion
" - dense-analysis/ale " for highlights
function SetCSSettings()
" Use deoplete.
call deoplete#enable()
" Use smartcase.
call deoplete#custom#option('smart_case', v:true)
" Use OmniSharp-vim omnifunc
call deoplete#custom#source('omni', 'functions', { 'cs': 'OmniSharp#Complete' })
" Set how Deoplete filters omnifunc output.
call deoplete#custom#var('omni', 'input_patterns', {
\ 'cs': '[^. *\t]\.\w*',
\})
" ... then goes your mappings for :OmniSharp* functions, see its doc
endfunction
augroup csharp_commands
autocmd!
" Use smartcase.
" call deoplete#custom#option('smart_case', v:true)
autocmd FileType cs call SetCSSettings()
augroup END

How do I run Lightswitch projects in Visual Studio 2015 without any errors?

I have created a simple Lightswitch desktop application in Visual Studio, added one table, and one search screen. When I ran it for the first time, it has shown a window with search screen with a red X mark. Hover over, it displays "Unable to load data. Please check your network connection and try loading again."
I've tried searching for lengthy hours with no luck. I've also tried the answers in this page without any luck. I have also tried granting permissions of all levels on the working directory of the project. Please help, this is very frustrating as I've expected so much from Microsoft but they failed to troubleshoot their faulty product.
Additional Information:
I am using Windows 10 Home, i7, 16 GB RAM, Visual Studio 2015 Ultimate with Update 3. I've tried to clean the entire solution and then debug. There is 1 error and 14 warning messages, here's the error:
<!--The Development Database is built in the same location - Bin\Data - for all configurations.-->
<BuildSchema Inputs="#(ServerMetadataFiles)"
ServerGeneratedMetadataFiles="#(ServerGeneratedMetadataFiles)"
Collation="$(DatabaseCollation)"
DatabaseProject="#(_DatabaseProject)"
ProjectPath="$(MSBuildProjectFullPath)"
OutputDirectory="Bin\Data"
SqlExpressInstanceName="$(SqlExpressInstanceName)"
ExternalDataSources="#(ServerExternalDataSources)"
Condition="'$(SkipBuildSchema)' == ''"/>
And here is one of the 14 errors:
Warning The element 'PropertyGroup' in namespace 'http://schemas.microsoft.com/developer/msbuild/2003' has invalid child element 'UseDesignTimeFeatures' in namespace 'http://schemas.microsoft.com/developer/msbuild/2003'. List of possible elements expected: 'Property, VisualStudioVersion, MinimumVisualStudioVersion, AdditionalFileItemNames, AllowUnsafeBlocks, AppConfigForCompiler, ApplicationIcon, ApplicationRevision, ApplicationVersion, AppDesignerFolder, AspNetConfiguration, AssemblyKeyContainerName, AssemblyKeyProviderName, AssemblyName, AssemblyOriginatorKeyFile, AssemblyOriginatorKeyFileType, AssemblyOriginatorKeyMode, AssemblyType, AutoGenerateBindingRedirects, AutorunEnabled, BaseAddress, BootstrapperComponentsLocation, BootstrapperComponentsUrl, BootstrapperEnabled, CharacterSet, CheckForOverflowUnderflow, CLRSupport, UseDebugLibraries, CodePage, Configuration, ConfigurationName, ConfigurationOverrideFile, CreateDesktopShortcut, CreateWebPageOnPublish, CurrentSolutionConfigurationContents, DebugSecurityZoneURL, DebugSymbols, DebugType, DefaultClientScript, DefaultHTMLPageLayout, DefaultTargetSchema, DefineConstants, DefineDebug, DefineTrace, DelaySign, DisableLangXtns, DisallowUrlActivation, CodeAnalysisAdditionalOptions, CodeAnalysisApplyLogFileXsl, .... Miscellaneous Files C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\LightSwitch\v5.0\Microsoft.LightSwitch.targets 19

error of updating an C# web service application by accessing a URL from MS installer command "msiexec" in C# VS 2010

This question is related to my previous question.
I need to publish a C# application (that has been set up in IIS 6.0 and built in VS2010) to a desktop with win7.
I have set up IIS on my desktop well. Now I can install the application on my laptop by accessing the URL
http://myDesktopName.domain.com/MyApp
pointing to a physical location in desktop
e:\myPath\myApp\myAppService.svc
When I publish a new version of the web service, the application should get updated when I open it.
But, it gave me an error:
**the filename,directory name, or volume label syntax is incorrect**
After searching online, I found this error is normally caused by some unacccepted chars in the link. Here is the code that the msi (MS installer) needs to access and get the new version of the application.
System.Diagnostics.Process.Start("msiexec", "/favmuso \"" + myurl + "\"");
here,
myurl is http://myDesktopName.domain.com/MyApp/MyAppSetup.msi
Here, http://myDesktopName/MyApp/ is the virtual directory set in IIS 6.0 on my desktop. I can access and download it from IE in my laptop without any problems.
But, when the application notified me that a new version is available for updating the old one, I clicked the pop-up ballon on the application icon and then I got the error:
Error 123. The filename, directory name, or volume label syntax is incorrect.
If I try to access it from the C# code, I got the same error.
Then, I did a test by running
msiexec **/favmuso** http://myDesktopName.domain.com/MyApp/MyAppSetup.msi /Lv mapp_msi.log
In the log file, i found :
MSI (s) (80:DC) [18:04:33:089]: SECREPAIR: Failed to open the
file:http://myDesktopName.domain.com/mypath/\myAppSdetup (10).msi for computing its hash. Error:123
Error 123. The filename, directory name, or volume label syntax is incorrect.
Why my applcation setup file name was changed to
\myAppSdetup (10).msi
The "/favmuso" options can be found at
https://technet.microsoft.com/en-gb/library/cc759262%28v=ws.10%29.aspx#BKMK_Install
Any help would be appreciated.
thanks

So I noticed that you've asked this question elsewhere, and everyone was focused on the /favmuso piece of it.
I've been recently exeriencing this issue when trying to repair MSIs with a URL source when the original application was installed by SCCM 2012.
The workaround I found was to add a registry value at HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer. The value below causes the MSI to skip the problematic portion of the repair and move on.
Name: SecureRepairPolicy
Type: REG_DWORD
Value: 1
To be a bit safer, you look into setting the registry value to 2 and using a whitelist as described in this Microsoft article: https://support.microsoft.com/en-us/kb/2918614. (Ctrl+F "Steps to opt-out the affected programs".)

Missing External Function in IEFrame.DLL and SHLWAPI.DLL when referencing SharpSVN

Note: This section contains incorrect information - skip to the update below for details. This section left in for historical purposes.
I have a WPF project in Visual Studio 2008 targeting .NET 3.5 that references SharpSVN. When I make a call into SvnClient.Export, I get an exception that Marshal.GetExceptionCode tells me is 0xc06d007e. This seems to be caused by a bad DLL. I have tracked (with the Dependency Walker) that DLL to two culprits: IEFRAME.DLL and SHLWAPI.DLL. They are missing the following export functions:
SHLWAPI.DLL: #270
IEFRAME.DLL: #141, #159, #160
I also initially had a missing DLL that was fixed by adding %ProgramFiles%\Internet Explorer to the path. I do not recall the DLL name.
This is a fresh install of Visual Studio 2008, SharpSVN 1.7002.1998.12257.
I can run the "svn" command that is provided with SharpSVN to export from our repository, so I am leaning toward a solution/project configuration/reference problem.
How do I fix this error?
*Update: I have refined my understanding of this problem. The SHLWAPI and IEFRAME issues appear to be a normal condition - User32.dll has the same behavior. I modified my environment in the following ways:
Environment variable [SVN_SSH] set to TortoisePlink [C:\Program Files\TortoiseSVN\bin\TortoisePlink.exe]
Updated uri target to use current username:
SvnUriTarget uriTarget =
new SvnUriTarget("svn+ssh://" + Environment.UserName + "#myserver/mypath");
With this configuration, I can successfully export when running this code as part of the WPF application. However, I still get errors when running as part of a MSTest project.
System.Runtime.InteropServices.SEHException: External component has thrown an exception.\r\n
at svn_client_export5(Int32* , SByte* , SByte* , svn_opt_revision_t* , svn_opt_revision_t* , Int32 , Int32 , Int32 , svn_depth_t , SByte* , svn_client_ctx_t* , apr_pool_t* )\r\n
at SharpSvn.SvnClient.Export(SvnTarget from, String toPath, SvnExportArgs args, SvnUpdateResult& result) in g:\\dist\\src\\sharpsvn\\commands\\export.cpp:line 100
at SharpSvn.SvnClient.Export(SvnTarget from, String toPath, SvnExportArgs args) in g:\\dist\\src\\sharpsvn\\commands\\export.cpp:line 66
at SimulationManager.Model.SubversionInterface.Export() in C:\\Users\\phines\\Documents\\Projects\\SimulationManager\\SimulationManager\\SimulationManager\\Model\\SubversionInterface.cs:line 43
I suspect this is due to a reliance on the presentation framework, but would still like to know if there is a way to get this working in a GUI-less way.

The errors with IEFrame and SHLWAPI are normal problems that depends reports as errors, but do not acutally cause the error. In my case, the error was caused by using SharpSVN in a non-user interface project. When moved to a WPF project, it worked as expected.
I have changed strategies to call a command shell "svn" application to achieve UI-less automation.

InvalidProgramException in Team Foundation Server Sample

Hi I get an System.InvalidProgramException while trying to run the Example Project called "C# Example.WorkItemBrowser".
The Exception also apears when I try to execute these lines:
TeamFoundationServer tfserver = new TeamFoundationServer("http://localhost:8085");
tfserver.EnsureAuthenticated();
WorkItemStore store = new WorkItemStore(tfserver);
Console.WriteLine(store.Projects.Count);
I'm using the 2008 Visual Studio SDK for that.
PEverify for the assembly Microsoft.TeamFoundation.WorkItemTracking.Client.dll
got this otuput:
[MD]: Error: Value class has neither fields nor size parameter. [token:0x020000B3]
[MD]: Error: Value class has neither fields nor size parameter. [token:0x020000BF]
[MD]: Error: Value class has neither fields nor size parameter. [token:0x020000C4]
3 Error(s) Verifying Microsoft.TeamFoundation.WorkItemTracking.Client.dll
A fresh download and install of the SDK as well as deinstall and install as well as installing .net 3.5 sp1 again didn't help.
Is something wrong with the description of my problem or did it just not happen anywhere else?

I just a very similar question here.
Turns out, you have to have Team Explorer installed on the machine you are executing this code on.