To solve this issue, first ensure that you already have the nuget packages for SQLite are installed:

Add these lines in machine.config:

    <system.data>
        <DbProviderFactories>
			  <remove invariant="System.Data.SQLite.EF6" />
			  <remove invariant="System.Data.SQLite" />
			  <add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".Net Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
			  <add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
    
		</DbProviderFactories>
    </system.data>

We can find machine.config in:

1. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\machine.config
2. C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config

That’s all friends. I hope it helps!

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System ArgumentException: The ADO NET provider with invariant name System Data SQLite EF6 is either not registered in the machine or application config file or could not be loaded