Driver=Composite 4.5;HOST=myServerAddress;PORT=9501;UID=myUsername;PWD=myPassword;DOMAIN=composite;DATASOURCE=PDSI;

Specifying catalog

Driver=Composite 4.5;HOST=myServerAddress;PORT=9501;Catalog=myCatalog;UID=myUsername;PWD=myPassword;DOMAIN=composite;DATASOURCE=PDSI;

.NET Framework Data Provider for ODBC

Use an ODBC driver from .NET

Driver={any odbc driver's name};OdbcKey1=someValue;OdbcKey2=someValue;

See the respective ODBC driver's connection strings options. The .net OdbcConnection will just pass on the connection string to the specified ODBC driver. Read more here.

Composite Information Server connection strings

Composite ODBC

DSN-less connection

Specifying catalog

.NET Framework Data Provider for ODBC

Use an ODBC driver from .NET