A quick way to delete all the bin and obj folders in your solution

Something like this is a cinch with Powershell

1. open the powershell command prompt
2. enter the command get-childitem -path "C:\sourceCode\MySolution" -recurse -include obj,bin | remove-item -force -recurse

Handy for ensuring your solution will build from scratch with no unreferenced/circular referenced assemblies or for deleting dlls that have become locked which sometimes happens. Same principle could easily be applied to the asp.net cache.