ASP.NET Core引用的.NET Framework中的程序集FileNotFound

Question

I have an ASP.NET Core v2.1 project which references a project that's .NET Framework 4.5. This .NET Framework project references System.Data.DataExtensions .

When i call a certain method of the .NET Framework project, i get this exception:

"Could not load file or assembly 'System.Data.DataSetExtensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified."

To remove all doubt, the file exists in the path (and also this is the path stated in the assembly properties) :

C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework.NETFramework\\v4.5\\System.Data.DataSetExtensions.dll

What am i missing here? Thank you.

EDIT: The called method is the third called method in the same class, and its code starts with this:

 var cardRecord = from row in CardsDataTables.CardDataTable.AsEnumerable()
                     where row.Field<string>("ca_number") == cardNumber
                     select row;

Answer 1

I had the same issue. I resolved it by adding reference to System.Data.DataSetExtensions through NuGet Package in Core 2.1 web project.