c# - ASP.NET RazorGenerator "WriteAttribute" is not defined -

i'm using razorgenerator https://github.com/razorgenerator/razorgenerator outsource menu dll file can share across multiplice projects. in views i've foreach loop should generate list this:

@foreach (var myitem in myclass.instance.elements) {     <li>         <img src="@myitem.icon" />     </li> } 

but can't compile them: myview.generated.cs file generated razorgenerator creating following line img tag:

writeattribute("src", tuple.create(" src=\"", 1038), tuple.create("\"", 1057) 

here problem because got error 'writeattribute' not defined. can't find many information method, seems method razorgenerator.

the strange thing tested same code before in testproject because it's first time i'm using razorgenerator. there works same loop can't find out differences. both projects have same references , assemblys in same version. ony found out writeattribute() came webpageexecutionbase.

how can fix issue?

by checking every package in both projects found out nuget-package microsoft.asp.net.webpages installed in outdatet version. can't figure out why because used "update all" button in nuget-manager of project did in testing-project , no errors shown. updatet package using nuget-console latest version 3.1.2 @ time write post , worked expected.