C#，SqlConnection出错Unable to find an entry point

[Flanesvoiy]

public void run()
{
string conn_str = "server=MSSQLSERVER01;uid=sunny;pwd=sunnyhoney";
sqlconn = new SqlConnection(conn_str);
sqlconn.Open();
}

sqlconn是SqlConnection类，报了个System.EntryPointNotFoundException:“Unable to find an entry point named 'PAL_LocalAlloc' in DLL 'dbnetlib.dll'.”的错在sqlconn.Open()
SqlClient类是添加引用放进去的，原本没有，是不是有什么东西没装完整

[stherix]

应该是版本不匹配 你可以用nuget下载,而不是自己去网上下dll放到工程里