Db Connection

Question

Hi
i'm looking for an example -> where  the connection to a db is definde one time and then you can need it for all formulars
my question is
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i make a connection for example:
static String connString = Properties.Settings.Default.auftragsverwaltungConnectionString;
MySqlConnection myconn = new MySqlConnection(connString);
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and now i can use for all formulars
myconn.open
Code ...

myconn.close


thanks for help
joshua