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Note that your Caps Lock is on, and that makes your post difficult to read.
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Hi,
For connection string related resources you could refer the following web site.
http://www.connectionstrings.com/oracle#p12
For connecting to ORACLE using Visual Studio, it is correct.
For choosing the database connectivity type,
1. Go for ODP.NET if you are writing a application which will have ORACLE as a database forever. Suppose in future if you want to extend the DB with other database like DB2,MS-SQL then go for OLEDB. Since this provides a generic interface for DB connectivity.
Check this site for features of ODP.NET.
http://www.oracle.com/technology/tech/windows/odpnet/ODP.NET-FOV.html
So now it is up to you
Regards,
raaj