So what do you do if you come across this error in Visual Studio?

System.Security.SecurityException: Request for the permission of type ‘System.Web.AspNetHostingPermission, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

The error typically occurs when you download files from an external source into your Visual Studio project. Windows will recognise the file came from an external source and restrict permissions.

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