c# - System.InvalidOperationException: Internal Connection Fatal Error. when opening sql connection -

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i've started playing around sql on c#, , i'm trying connect remote sql server. i've added ip list of hosts have remote access permission.

my code keeps producing error:

system.invalidoperationexception: internal connection fatal error.
@ system.data.sqlclient.tdsparserstateobject.trypocessheader<>
@ system.data.sqlclient.tdsparserstateobject.trypreparebuffer<>
@ system.data.sqlclient.tdsparserstateobject.tryreadbytearray<.byte[] buff, int32 offset, int32 len, int32& totalread>

the trace longer that, first few lines.

this code that's causing error (my actual connection string has correct username, password, , database name):

connectionstring = "data source=173.254.28.27,3306;network library=dbmssocn;initial catalog=mydatabase;user id=myusername;password=mypassword;"; using (sqlconnection myconnection = new sqlconnection(connectionstring)) {     try { myconnection.open(); }     catch (exception e) { console.writeline(e.tostring()); } }

any appreciated.

thanks!

edited

if using mysql server connection string wrong!

try connectionstring :

_connectionstr = new mysqlconnectionstringbuilder             {                 server = "173.254.28.27",                 database = mydatabase,                 userid = myusername,                 password = mypassword,                 connectiontimeout=60,                 port = 3306,                 allowzerodatetime = true             };             _con = new mysqlconnection(_connectionstr.connectionstring);              try             {                 _con.open();             }             catch             {                 console.writeline("error, can't connected!");             }

if using sqlserver try disabling connection pool through connection string!

by adding :

pooling=false

good luck!


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