asp.net mvc

i have a problem with Entity. Want to use Entity in DbContext class but it is not working even though I added it to the packages. So when i write the "System.Data.Entity", it turns red. (Error: CS0234) Maybe Visual Studio doesn't see the Entity package. Visual Studio 2019 .NET Core 2.0...

Hi there, could you tell me how to hidden one of the attribute in cshtml, so it doesn't show up on inspect element ex : before : <span id="1" data-customeID="2">text</span> after : <span id="1">text</span> Thank you

At the moment, my program is able to upload files and display alert messages to users when it is uploaded. The thing is now, after uploading, it is supposed to see if it is a duplicate file or not. If it is, then a message alert will inform the user that it is a duplicate while if it is new ...

<a class="button" ng-click="L(Post)" ng-if="Post.uid =='true'" href="/About/Aboutpage" style="text-decoration:none;" ng-init="LDetails(Post)"> <input type="image" alt="" src="~/Images/like.png" style="max-height:20px; max-width:20px;" />&nbsp;Like<span class="badge">{{Post.L}}</span> </a> <a...