User839733648 posted
Hi SANJISH KUMAR,
As mgebhard has said, it is not encouraged to use server controls with Angular.
In my opinion, you could build your Angular application using some editor such as Visual Studio Code that is friendly to the Angular CLI.
Consider not adding Angular to your Web Forms project and instead keeping it separate with its own functionality.
But it still could communicate with whatever backend (Web API) you have created.
Besides, if you want to you use .Net along with Angular, I suggest that you could choose to create an .Net Core application.
References:
https://docs.microsoft.com/en-us/aspnet/core/client-side/spa/angular?view=aspnetcore-2.2&tabs=visual-studio
https://www.c-sharpcorner.com/article/create-an-angular-7-app-with-asp-net-core-2-1/
Best Regards,
Jenifer