Debugger Edit and Continue Support
You can make changes to your source code during a debugging session without stopping to recompile your program and restarting the debugging session. With Edit and Continue, you can change your code while in Break mode and, in most cases, your changes are applied when you select a debugger execution command such as Continue or Step.
Edit and Continue can be used to make changes to your code when programming in Visual Basic, Visual C#, or Visual C++. There are exceptions and limitations in each language, but the most common changes are supported by Edit and Continue.
To change Edit and Continue settings, click Tools, click Options, click the plus sign next to Debugging to expand it, and then click Edit and Continue.