Copilot generates incorrect C# and may delete existing code if adding XML comments

[watfordsuzy]

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Visual Studio Code: 1.93.1 (Universal) Commit: 38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40
GitHub Copilot extension: v1.234.0

If I do something like the following in VS Code:

public static class ApiErrorTypes
{
    /// <summary>
    /// The request does not have sufficient authentication for this operation.
    /// </summary>
    public const string UNAUTHORIZED = "unauthorized";
{<cursorhere>}
}

Then with my cursor where indicated, do something like:

You'll note it deleted the existing comments (and code if there is more), and pushed the last const field in the class off to the right.

Worse, when I click discard I'm left in an inconsistent state and hopefully have the Undo buffer to get back to proper code:

If I instead add some whitespace like so:

public static class ApiErrorTypes
{
    /// <summary>
    /// The request does not have sufficient authentication for this operation.
    /// </summary>
    public const string UNAUTHORIZED = "unauthorized";

{<cursorhere>}
}

I no longer have the issue of code being deleted from prior in the class, but excessive documentation comment starts (///) are added and break the trailing brace in the class:

If I go ham on the whitespace and pick a nice cursor location in the middle, I still get excessive documentation comment starts but I at least don't get anything overwritten:

[EfremMic]

It seems like you’re encountering an issue where GitHub Copilot keeps adding XML comments even after deleting them in VS Code. Here’s a short solution to fix it:

Disable Inline Suggestions:

Go to Settings in VS Code.
Search for Copilot: Enable Inline Suggestions.
Uncheck this setting to stop Copilot from auto-suggesting comments.
Turn Off GitHub Copilot Temporarily:

Use Ctrl+Shift+P to open the command palette.
Type "GitHub Copilot: Disable" and select Disable Copilot for the current file or globally.
This should stop the automatic comment suggestions. Let me know if it works!

[watfordsuzy]

This is not the case. I am asking Copilot to generate code and it is generating it incorrectly and deleting existing code during the generation, not while my cursor is resting and awaiting a suggestion.

Or are you suggesting Copilot can't be used with Inline Suggestions? If that's the case...I don't understand Copilot.