for /r %i in (*.sln) do C:WindowsMicrosoft.NETFrameworkv4.0.30319MSBuild.exe /p:Configuration=Release %i

"PATH TO VISUAL STUDIOCommon7IDEdevenv.com" /build Release solution.sln

C:WindowsMicrosoft.NETFrameworkv4.0.30319MSBuild.exe /p:Configuration=Release pathtosolution.sln

gci -r ТУТ_ВАШ_КАТАЛОГ *.sln | foreach { & C:WindowsMicrosoft.NETFrameworkv4.0.30319MSBuild.exe /p:Configuration=Release $_.FullName }