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<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings >
<add key="url" value="localhost"/>
<add key="database" value="db"/>
<add key="uname" value="root"/>
<add key="psd" value="123456" />
</appSettings >
</configuration>
string url = System.Configuration.ConfigurationManager.AppSettings["url"];
string database = System.Configuration.ConfigurationManager.AppSettings["database"];
string uname = System.Configuration.ConfigurationManager.AppSettings["uname"];
string psd = System.Configuration.ConfigurationManager.AppSettings["psd"];
SqlConnection conn = new SqlConnection(@"data source=
" + url + ";uid=" + uname + ";pwd=" + psd + ";database=" + database);
conn.Open();
MySQLConnection conn = new MySQLConnection(@"data source=
" + url + ";uid=" + uname + ";pwd=" + psd + ";database=" + database);
conn.Open();