Npgsql EF 关于配置

1、在路径：C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config 找到machine.config

对其进行增加：<DbProviderFoctories>

<add name="Npgsql Data Provider" invariant="Npgsql" support = "FF"
description=".Net Framework Data Provider for Postgresql server" type="Npgsql.NpgsqlFactory, Npgsql, Version=2.0.11.91, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7"/>