OmniSharp/csharp-language-server-protocol

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Language Server Protocol in C#

Stars: 638
Forks: 109
Open beginner issues: 0
Indexed issues: 89
Avg merge: 1m
Merged PRs (30d): 2

Dominant language: C#
License: MIT
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

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89 open issues indexed

MediatR >=v9 licensing Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1807 · Opened Aug 6, 2026
LSP 3.18 Support Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1764 · 3 comments · Opened Jun 9, 2026
Odd behaviour when just syncing a date string Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1689 · Opened Jan 27, 2026
Custom handler isn't being called Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

OmniSharp/csharp-language-server-protocol#1615 · 1 comment · Opened Oct 18, 2025
Unable to Initialize Client Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1558 · Opened Jul 22, 2025
.NET 6.0 and .NET 3.1 are EOL Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#1552 · 1 reaction · Opened Jul 12, 2025
FileRename missing OldUri Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

OmniSharp/csharp-language-server-protocol#1545 · 3 comments · Opened Jul 1, 2025
LSP Client Initialize should return after capabilities response and not wait until server Initialized Message Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OmniSharp/csharp-language-server-protocol#1408 · Opened Dec 3, 2024
LSPServerOutputFilter filtering valid initialize progress messages Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1390 · 2 comments · Opened Nov 10, 2024
Can Language Server (LSP) run in the same process as devenv.exe ? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

OmniSharp/csharp-language-server-protocol#1347 · 1 comment · Opened Sep 13, 2024
Exception "No method by the name 'initialize' is found." Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1318 · Opened Aug 13, 2024
Wrong method name sent for `RequestCallHierarchyOutgoing` Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

OmniSharp/csharp-language-server-protocol#1303 · Opened Jul 26, 2024
A new language server framework Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OmniSharp/csharp-language-server-protocol#1290 · 2 comments · 7 reactions · Opened Jul 14, 2024
Minimal example of server with Microsoft.Extensions.DependencyInjection Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#1276 · 1 comment · 1 reaction · Opened Jun 30, 2024
Which version of LSP spec does it implement? Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

OmniSharp/csharp-language-server-protocol#1275 · 1 comment · 1 reaction · Opened Jun 29, 2024
InputHandler Memory Leak Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1262 · Opened Jun 19, 2024
NotImplementedException when trying to get document diagnostics Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

OmniSharp/csharp-language-server-protocol#1250 · Opened Jun 5, 2024
sample project does not connect over stdio channel in vscode Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#1176 · 4 reactions · Opened Jan 18, 2024
Issue with GetConfiguration when `workspace.configuration` capability is declared with the `workspace.didChangeConfiguration` capability Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OmniSharp/csharp-language-server-protocol#1101 · Opened Nov 13, 2023
Using LanguageClient in a Visual Studio extension Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

OmniSharp/csharp-language-server-protocol#1076 · Opened Oct 20, 2023
IntelliJ Support - Gets a Exception in the SemanticTokensHandler.CreateRegistrationOptions Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#1068 · Opened Oct 14, 2023
Suspected Memory Leak in Language Client Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#1037 · 1 comment · 1 reaction · Opened Sep 26, 2023
Purpose of this library is not immediately obvious Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

OmniSharp/csharp-language-server-protocol#1017 · 3 comments · 2 reactions · Opened Sep 12, 2023
Should `%` in `DocumentUri.Path` be encoded in `DocumentUri.ToUri()`? Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

OmniSharp/csharp-language-server-protocol#1005 · Opened Aug 18, 2023
StoppedEvent is missing hitBreakpointIds property Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#996 · Opened Jul 18, 2023
Handling requests without blocking on standard input Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#986 · Opened Jun 20, 2023
Debug Adapter Server for Visual Studio Initialize issue Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

OmniSharp/csharp-language-server-protocol#982 · Opened Jun 4, 2023
Debug language server (c#) for vscode Language Server Extension in Rider Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OmniSharp/csharp-language-server-protocol#978 · Opened May 22, 2023
Retrieve project main class / class path Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#968 · 1 comment · Opened May 3, 2023
Internal class WorkspaceConfigurationProvider is returned from Public APIs Open

Difficulty 1/5 Under an hour Newbie friendliness 38/100

OmniSharp/csharp-language-server-protocol#953 · Opened Mar 15, 2023
Getting started with the DAP Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#948 · Opened Mar 13, 2023
Mono build to load MSBuild Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#944 · 1 reaction · Opened Mar 11, 2023
Unable to start language server (?) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#933 · 13 comments · Opened Feb 1, 2023
Nullpointer Exception when using WithLoggerFactory Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

OmniSharp/csharp-language-server-protocol#913 · 2 reactions · Opened Dec 16, 2022
Range must not span multiple lines (Parameter 'range') Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#906 · Opened Dec 3, 2022
Not sure where this bug should live. Language Server Bug Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#887 · 2 comments · Opened Sep 20, 2022
Update to Version 3.17 Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OmniSharp/csharp-language-server-protocol#886 · 3 comments · 2 reactions · Opened Sep 7, 2022
Status of this library after recent announcements Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OmniSharp/csharp-language-server-protocol#885 · 4 comments · 12 reactions · Opened Jul 21, 2022
Exception thrown when using ResolveCompletion() Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OmniSharp/csharp-language-server-protocol#877 · Opened Jun 27, 2022
Documentation property always null in CompletionItem Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#874 · Opened Jun 24, 2022
Use of WithInitializationOptions() in LSP Client Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

OmniSharp/csharp-language-server-protocol#873 · 3 comments · Opened Jun 23, 2022
InternalErrorException error Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

OmniSharp/csharp-language-server-protocol#870 · Opened Jun 22, 2022
Dependency Dashboard Open

Difficulty 5/5 Over a week Newbie friendliness 5/100

OmniSharp/csharp-language-server-protocol#829 · Opened Apr 28, 2022
Support for pull-based diagnostics? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

OmniSharp/csharp-language-server-protocol#796 · 1 comment · Opened Apr 4, 2022
SemanticTokens stops working after a switch from Parallel to Serial cancels a pending request Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#784 · 2 comments · 1 reaction · Opened Mar 20, 2022
Internal error in sample server's implementation of semantic tokens Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#783 · Opened Mar 20, 2022
Bug in SemanticTokensDocument.GetSemanticTokenEdits Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

OmniSharp/csharp-language-server-protocol#782 · 1 reaction · Opened Mar 18, 2022
Language server stays silent when not calling Initialize on it Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OmniSharp/csharp-language-server-protocol#769 · Opened Mar 7, 2022
Inlay provide? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

OmniSharp/csharp-language-server-protocol#766 · 2 reactions · Opened Mar 7, 2022
Running the server Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

OmniSharp/csharp-language-server-protocol#764 · 1 comment · 2 reactions · Opened Mar 1, 2022

OmniSharp/csharp-language-server-protocol

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