ive updated the angular core form 5.1 to 7.2 also angular-cli
after when i try to serve my application it gives me error The serve command requires to be run in an Angular project, but a project definition could not be found.
thanks
already tried this solution but it didn't work
here is my version description
Angular CLI: 7.2.2
Node: 8.11.1
OS: win32 x64
Angular: 5.2.11
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router
Package Version
------------------------------------------------------
@angular-devkit/architect 0.12.2
@angular-devkit/core 7.2.2
@angular-devkit/schematics 7.2.2
@angular/cli 7.2.2
@schematics/angular 7.2.2
@schematics/update 0.12.2
rxjs 5.5.12
typescript 2.5.3