References For SharePoint In C# Winform App

Question

I am working on a windows forms app and trying to connect to a sharepoint site. I do not have sharepoint installed on my PC so from my googling I have leant that I must use client side code.

When I right click references in my project and go to add reference the only one that has Sharepoint is

Microsoft.Sharepoint.FirefoxPlugin

I do not believe that is what I am after. How do I get the client side DLLs required to connect to sharepoint from my windows form app?

EDIT
I tried following the guide in this link, but I do not have the .dll located in this location as the link shows

Add the following assemblies from hive 15 (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\ISAPI).

https://www.c-sharpcorner.com/article/sharepoint-client-object-modal-csom/

Answer 1

install the sharepoint client nuget packages

https://www.nuget.org/packages/Microsoft.SharePoint.Client.dll/

Answer 2

Download the SharePoint CSOM SDK and install, then the dll can be found in C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI

SharePoint 2013 CSOM Download