static CodeMemberMethod XF(int args)
{
var t = new CodeTypeReference("System.Linq.Expressions.Expression", Types.Func(args));
var m = CreateMethod("XF", t, "expr", args, true);
m.Comments.AddDocs(
XmlDocs.TypeParams(m.TypeParameters, t),
XmlDocs.Param("expr", "The " + XmlDocs.See(t) + " to return."),
XmlDocs.Summary("Creates a " + XmlDocs.See(t) + " expression tree."),
XmlDocs.Returns("Returns <paramref name=\"expr\" />.")
);
return(m);
}