To start debugging
If you choose Start, your application starts up and runs until it reaches a breakpoint. You can break execution at any time to examine values, modify variables, and otherwise examine the state of your program.
If you choose Step Into or Step Over, your application starts up, executes its first statement, then enters a break state.
If you choose Run to Cursor, your application starts up and runs until it reaches a breakpoint or the cursor location in the source or Disassembly window (whichever comes first).
Your solution may contain more than one project. In that case, you can choose the startup project that will be launched by the Debug menu execution commands. Alternatively, you can start a selected project to start from the Solution Explorer.