RazorEngineCore - How to use extension methods - razor

Question

I am working with RazorEngineCore and am coming across an issue where extension methods are not being identified properly. In my sample below, I am trying to use LINQ's single, and the error is:
'System.Collections.Generic.List' does not contain a definition for 'First'
I've added the required assemblies using AddAssemblyReferenceByName() and assume it would load correctly. Yet I'm still getting the error.
Sample code:
class Program
{
static string Content = #"
Hello #Model.Name
First item: #Model.Items.First();
#foreach(var item in #Model.Items)
{
<div>- #item</div>
}
<div data-name=""#Model.Name""></div>
<area>
#{ RecursionTest(3); }
</area>
#{
void RecursionTest(int level){
if (level <= 0)
{
return;
}
<div>LEVEL: #level</div>
#{ RecursionTest(level - 1); }
}
}";
static void Main(string[] args)
{
IRazorEngine razorEngine = new RazorEngine();
IRazorEngineCompiledTemplate template = razorEngine.Compile(Content,
builder =>
{
builder.AddAssemblyReferenceByName("System.Collections");
builder.AddAssemblyReferenceByName("System.Linq");
});
string result = template.Run(new
{
Name = "Alexander",
Items = new List<string>()
{
"item 1",
"item 2"
}
});
Console.WriteLine(result);
Console.ReadKey();
}
}
Edit: When I call the extension method fully qualified, it works. ie, calling System.Linq.First(myList) instead of myList.Single().