Add info on requirement for csharp

myproject.demo.yml

@@ -1,7 +1,11 @@
 # absolute path to the project
 project_root: /path/to/project
+
 # language of the project (csharp, python, rust, java, typescript, javascript, go, or ruby)
+# Special requirements:
+#  * csharp: Requires the presence of a .sln file in the project folder.
 language: python
+
 # list of directories to ignore: either names (e.g. "temp") or relative paths (e.g. "build/foo")
 ignored_dirs: [".git", "temp"]
 
@@ -37,8 +41,6 @@ ignored_dirs: [".git", "temp"]
 # write_memory
 excluded_tools: []
 
-
-
 # Whether to open a graphical window with Serena's logs (not supported on MacOS).
 # This is useful both for troubleshooting and for monitoring the tool calls,
 # especially when using the agno playground, since the tool calls are not always shown,
@@ -49,5 +51,6 @@ excluded_tools: []
 # previous instances. This leads to multiple log windows being opened, and only the last
 # window being updated. Since we can't control how agno or Claude Desktop starts Serena, we have to live with this limitation for now.
 gui_log_window: True
+
 # minimum log level for the GUI log window (10 = debug, 20 = info, 30 = warning, 40 = error)
 gui_log_level: 20