Getting error that systemcore_enumerabledebugview missing?

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C#

IFrame

layers

So I'm trying to get data that is 3 iframes deep into the website.
When I scan the web browser with

foreach (HtmlWindow frame in webBrowser1.Document.Window.Frames)

I get the {webBrowser1.Document.Window.Frames} in it I can navigate to the text I need. When I copy the path it looks like this:

((mshtml.HTMLIFrameClass)(((System.Windows.Forms.HtmlWindow)((new System.Linq.SystemCore_EnumerableDebugView(((System.Windows.Forms.HtmlWindow)((new System.Linq.SystemCore_EnumerableDebugView(((System.Windows.Forms.HtmlWindow)((new System.Linq.SystemCore_EnumerableDebugView(webBrowser1.Document.Window.Frames)).Items[0])).Frames)).Items[1])).Frames)).Items[0])).WindowFrameElement.DomElement)).IHTMLFrameBase_src

How can I use that to get the _src? Because when I try to use it I have to remove the Class from HTMLIFrameClass or else it throws an error. And I can't seem to figure out the

System.Linq.SystemCore_EnumerableDebugView

as it says the

SystemCore_EnumerableDebugView

is missing?

What I have tried:

Can't figure out how to get the data out of the layered IFrames. I tried googling why the SystemCore_EnumerableDebugView is missing...? Hence why I'm here.