If in both cases we return the input, this function isn't really doing anything.

In C# this function would be kinda like:

enum LocalizationSourcePartType { Text, Variable }

string deTag(LocalizationSourcePart t)
{
    if (t.LocalizationSourcePartType == LocalizationSourcePartType.Text) {
        var s = (string)t;
        return s;
    }
    if (t.LocalizationSourcePartType == LocalizationSourcePartType.Variable)
    {
        var s = (string)t;
        return s;
    }
    
    throw new Exception("This can never be hit because of the enum values");
}

So, it still does map a LocalizationSourcePart to either its Text or Variable property. Is there a more elegant way to do that?

@distinctdan The more I look at it, I think this function is actually required to appease the compiler's type checker. Even thought a LocalizationSourcePart is effectively a string, you still need a mapping function to String. The name deTag isn't really appropriate though.

I would just call is asString or stringify or something (because ToString is already a default method in .NET which will return the type name here I believe.

Yeah, I'd agree. I'm thinking I'll leave it alone for now since we're wanting to make some significant revisions to the compiler anyways in the future as well.

Consider adding open System.Text.RegularExpfessions a few lines up to avoid inline namespaces.

Will do