Do I have to install the framework to use an application built with the same framework?...and several other questions

_This issue has been moved from [a ticket on Developer Community](https://developercommunity.visualstudio.com/t/Do-I-have-to-install-the-framework-to-us/10407326)._

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Hello everyone, I want to ask a group of questions.

I want to develop an application **CRM**, **what is the appropriate technology to build it using .NET**, with a mention of the reason, although I have thought about using WPF, I am confused about whether to use **WPF .net or WPF .net framework**.

Also, I want to make sure there is no difference between **.NET and .NET core**.

Finally, I have read that the .NET framework needs to be installed on the device in order for applications built using the .NET framework to work. Does this also apply to the .NET and other frameworks?

With regard to the first question, the WPF.NET documents recommend using the .NET, but there are websites that advised that I use the .NET framework, which made me confused because WPF is used to build Windows applications only, so what is the difference?
The second question was due to the lack of clarity of the answers
**And thank you all.**

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### Original Comments

#### Feedback Bot on 7/5/2023, 08:45 AM:

(private comment, text removed)