System.Xml.Xsl.XsltOld.ContainerAction.CompileNamespaceAlias C# (CSharp) Method

        internal void CompileNamespaceAlias(Compiler compiler) {
            NavigatorInput input   = compiler.Input;
            string         element = input.LocalName;
            string namespace1 = null, namespace2 = null;
            string prefix1 = null   , prefix2 = null;
            if (input.MoveToFirstAttribute()) {
                do {
                    string nspace = input.NamespaceURI;
                    string name   = input.LocalName;

                    if (! Keywords.Equals(nspace, input.Atoms.Empty)) continue;

                    if (Keywords.Equals(name,input.Atoms.StylesheetPrefix)) {
                        prefix1    = input.Value;
                        namespace1 = compiler.GetNsAlias(ref prefix1);
                    }
                    else if (Keywords.Equals(name,input.Atoms.ResultPrefix)){
                        prefix2    = input.Value;
                        namespace2 = compiler.GetNsAlias(ref prefix2);
                    }
                    else {
                        if (! compiler.ForwardCompatibility) {
                            throw XsltException.Create(Res.Xslt_InvalidAttribute, name, element);
                        }
                    }
                }
                while(input.MoveToNextAttribute());
                input.ToParent();
            }

            CheckRequiredAttribute(compiler, namespace1, Keywords.s_StylesheetPrefix);
            CheckRequiredAttribute(compiler, namespace2, Keywords.s_ResultPrefix    );
            CheckEmpty(compiler);

            //String[] resultarray = { prefix2, namespace2 };
            compiler.AddNamespaceAlias( namespace1, new NamespaceInfo(prefix2, namespace2, compiler.Stylesheetid));
        }