How to deploy dll file of website on IIS server.

 http://www.unigui.com/doc/online_help/iis_7_0.htm

Microsoft application block

 It is used for data access layer helper.

To deploy a webapp on IIS server with visual studio

 >Run visual Studio as administrator

>Click on "Build" and than click on "Publish"(screenshot below)

Note:- You will see dll files in bin folder by clicking on build or publish.

reference:- https://www.c-sharpcorner.com/UploadFile/b07128/deploy-Asp-Net-website-on-iis-in-our-local-machine/

How to register DLL file in Wondows?

 >Run command(REGSVR32) in command prompt

> REGSVR32 (location of dll file)

How to change the .net version in Visual Studio?

 >Click on Solution Explorer.

>Right click on Project.

>Click on "Property pages"(Screenshot below)

>Than click on Build

>And you can change .net version(screenshot below)