Add support for xmldoc tags on local functions (C# 7.0+)

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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Support for local functions was added in C# 7.0, which is awesome. However, decorating a local function with <summary>...</summary> tags will not produce any Intellisense in Visual Studio 2019 (as of version 16.2.5):

private static string GetText(string path, string filename)
{
    /// <summary>
    /// Append a path separator character to the specified file path.
    /// </summary>
    string AppendPathSeparator(string filepath)
    {
        if (!filepath. EndsWith(@"\"))
           filepath += @"\";

return filepath;   
    }

// No Intellisense for the "AppendPathSeparator" local function will appear here.
    var sr = File.OpenText(AppendPathSeparator(path) + filename);
    var text = sr. ReadToEnd();
    return text;
} 

It would be great to have some way of producing Intellisense for local functions.

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Original Comments

Jane Wu [MSFT] on 9/18/2019, 08:07 PM:

Thank you for taking the time to provide your suggestion. We will do some preliminary checks to make sure we can proceed further. We’ll provide an update once the issue has been triaged by the product team.

[sharwell]

Duplicate of dotnet/csharplang#2110