Parameters needed to connect to a MySql Database using C# -

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when want connect database using c# visual studio 2013, provide following parameters "connectionstring" using "mysqlconnection":

string server="localhost"; string database="database123"; string uid = "*****"; string password = "******"; string port = "3306";

but noticed if don't provide "database" or "port" works fine too. question should 1 provide establish proper connection? or considered sufficient info establish connection?

i use this. 

sqlconnection connection = new sqlconnection("server=somthing; database=something; user id=******; password=******");

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