Simple.Data.Npgsql by Chris Hogan,Yaroslav Tatarenko

<PackageReference Include="Simple.Data.Npgsql" Version="0.19.0" />

 PgConnectionProvider

public string ConnectionString { get; }

public bool SupportsCompoundStatements { get; }

public bool SupportsStoredProcedures { get; }

public string GetIdentityFunction()

public void SetConnectionString(string connectionString)