RCS1197 does not know about `AppendInterpolatedStringHandler`

[jnyrup]

Product and Version Used:
v4.1.0

Steps to Reproduce:
C# 10 introduced Improved Interpolated Strings and .NET 6 added an overload StringBuilder.Append(ref AppendInterpolatedStringHandler) which lets you write

new StringBuilder().Append($"13{37}");

and at compile time it is translated into

StringBuilder stringBuilder = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler handler = new StringBuilder.AppendInterpolatedStringHandler(2, 1, stringBuilder);
handler.AppendLiteral("13");
handler.AppendFormatted(37);
stringBuilder.Append(ref handler);

SharpLab

Actual Behavior:
RCS1197 is reported

Expected Behavior:
RCS1197 should not be reported

[fgimian]

Confirmed here also, and I think that:

arguments.Append($" CONTENTDIR=\"{destinationPath}\"");

Really does look much clearer than:

arguments.Append(" CONTENTDIR=\"").Append(destinationPath).Append('\"');

😸

[udlose]

any update on this bug?

[josefpihrt]

Confirmed here also, and I think that:

arguments.Append($" CONTENTDIR=\"{destinationPath}\"");

Really does look much clearer than:

arguments.Append(" CONTENTDIR=\"").Append(destinationPath).Append('\"');

I agree.

Let's remove cases with interpolated string and string concatenation from RCS1197.