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 hade the same problem. After trying the other solutions here without luck, I had to repair the installation through the installer. 

> 
> Control Panel > Programs > Programs and Features
> 
> 
> 

Then scroll down to Microsoft Visual Studio, right click it, then "Change". Then at the bottom of the window, click Repair. The repair process will take a decent amount of time, and at the end you will have to restart your computer.

This fixed the problem to me, and I hopes it will help you.