[docgen] Update CONFIG.md

skip-checks: true

CONFIG.md

@@ -16,6 +16,7 @@ that config.
 - [cmake](#cmake)
 - [codeqlls](#codeqlls)
 - [crystalline](#crystalline)
+- [csharp_ls](#csharp_ls)
 - [cssls](#cssls)
 - [dartls](#dartls)
 - [denols](#denols)
@@ -540,6 +541,39 @@ require'lspconfig'.crystalline.setup{}
 ```
 
 
+## csharp_ls
+
+https://github.com/razzmatazz/csharp-language-server
+
+Language Server for C#.
+
+csharp-ls requires the [dotnet-sdk](https://dotnet.microsoft.com/download) to be installed.
+
+The preferred way to install csharp-ls is with `dotnet tool install --global csharp-ls`.
+
+
+
+**Snippet to enable the language server:**
+```lua
+require'lspconfig'.csharp_ls.setup{}
+```
+
+**Commands and default values:**
+```lua
+  Commands:
+
+  Default Values:
+    cmd = { "csharp-ls" }
+    filetypes = { "cs" }
+    init_options = {
+      AutomaticWorkspaceInit = true
+    }
+    root_dir = function(startpath)
+        return M.search_ancestors(startpath, matcher)
+      end
+```
+
+
 ## cssls