What does “external code” in the call stack mean?

Question

I call a method in Visual Studio and attempt to debug it by going over the call stack.

Some of the rows in it are marked \"External code\".

What exactly does thi

Answer 1

These are the lines where symbol information is not currently available for Visual Studio Debugger. In other words Debugger is not able to retrieve code from the line executed.

I wrote currently because the symbol information can be downloaded or setup.

For more information you can read this : How to: Specify Symbol Locations and Loading Behavior