VS' debugger allows you to manipulate code while debugging it, with some limitations e.g when you're writing COM code, but generally the craziest thing I did wa

VS' debugger allows you to manipulate code while debugging it, with some limitations e.g when you're writing COM code, but generally the craziest thing I did was putting breakpoint after SQL bad call, editing SQL string, at function exit adding call to itself with passing the same args, going into the same function and catching the same breakpoint while executing new SQL and then removing that function call and letting program continue. it allows you to evaluate expressions at fly it allows you to back in time (move e.g 2 LoC above) it allows you to use the Immediate window to debug and evaluate expressions, execute statements, and print variable values. The Immediate window evaluates expressions by building and using the currently selected project.