Merge branch 'main' of github.com:dotnet/dotnet-api-docs into obsolete-misc

Author: gewarren

.github/copilot-instructions.md

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+Code comments should end with a period.
+
+When you add a code snippet to the XML remarks of an API, add the code as a separate code file (.cs file) and not as an inline (```) code block. Also add a .csproj file to compile the code if one doesn't already exist in the snippet folder.
+
+Don't use the word "may". Use "might" to indicate possibility or "can" to indicate permission.
+
+There should always be a comma before a clause that begins with "which".
+
+Use a conversational tone with contractions.
+
+Be concise.
+
+Break up long sentences.
+
+Use the present tense for instructions and descriptions. For example, "The method returns a value" instead of "The method will return a value."
+
+Use the Oxford comma in lists of three or more items.