Question: I have installed VS 2015 RTM (nothing else) and I'm unable to debug any solution, not matter if it's an existing one or a brand new one (created with VS 2015 and compiled against .Net Framework 4.6), it only opens a new tab in VS which is called Break Mode with the following text:
The application is in break mode
Your app has entered a break state, but no code is executing that is supported by the selected debug engine (for e.g. only native runtime code is executing).
And if I check the Debug --> Module Window:
VS2015Test.vshost.exe no symbols loaded (even if I click load symbol it does not work)
VS2015Test.exe symbols loaded

And it also doesn't show the output on the console(it's a console application that just has the following lines of code:

```
class Program
{
        static void Main(string[] args)
        {
            Console.WriteLine("TEST");
            Console.ReadKey();
        }
    }

```

I tried to reinstall VS 2015, restarted the computer, deleted all files in %temp%/AppData/Microsoft/Visual Studio/14, started VS in Admin Mode but nothing seems to work.

One thing which makes debugging working is this option:
Tools --> Options --> Debugging --> Use Managed Compability Mode

^^But that can't be the solution to use an old/legacy mode.

BTW: Debugging in VS 2013 is working fine.

Any help would be appreciated.

Answer: 
1. Stop debugging.
2. Edit csproj.user file
3. Find section wrote below:

> 
> <SilverlightDebugging>True</SilverlightDebugging>
> 
> 
>
4. Change Value to "False"
5. Unload and reload your project in Visual Studio.
6. Sometimes it needed to close Visual Studio.
I had this same issue. In my case, the dll I was trying to debug was installed in the GAC. If your debugging breakpoint hits when you aren't referencing any object in the target assembly, but doesn't when you reference the assembly, this may be the case for you.