Could not load file or assembly System.Data.SqlClient, Version=4.2.0.2 when I use System.Data.SqlClient Version 4.4.3

Question

I use System.Data.SqlClient Version 4.4.3 for all .NET Standard 2.0 class libraries in my ASP.NET Core 2.0 project. Why do I get

Cou

Answer 1

I got the same issue, SerializationException with message:

Unable to find assembly 'Microsoft.Data.SqlClient,  
March 3rd 2020 16:36:46Error
Version=1.0.19269.1, Culture=neutral, PublicKeyToken=23ec7fc2d6eaa4a5'

but everything is ok with dll, issue was caused by invalid connection string, it takes me almost few hours to figure out what happens!