C-SHARP - 7.2 Deboging tools in Visual Studio

Visual Studio ships with a built-in debugger that is probably the most valuable tool for a C# developer. Instead of guessing what your program is doing, you can stop it at a precise point, inspect the value of every variable, and step through it to understand the real behavior. This lesson covers the main tools used during a debugging session.

The starting point is the breakpoint: a click in the margin to the left of a line is enough to set one. When execution reaches that line, the program pauses and Visual Studio switches to debug mode. You can then use F10 to run the next line without stepping into method calls, and F11 to step into the current call and go deeper into the execution hierarchy.

The debugging windows complete this toolkit. The Locals window automatically displays the variables in the current scope. The Watch window lets you add custom expressions to monitor, for example list.Count or user.Email.ToLower(). The Call Stack window shows the chain of calls that led to the current point, which helps you reconstruct the context.

Visual Studio also handles exceptions in a specific way. When an exception occurs during debugging, the IDE highlights the offending line, displays the exception type and its message, and lets you walk up the stack to identify the root cause. Combined, these features turn debugging from an intuitive activity into a methodical, repeatable process.