SQL Server 2019
Use an OLE DB provider from .NET
Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;User Id=myUsername;Password=myPassword;OLEDB.NET=True; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; Provider=any oledb provider's name;OledbKey1=someValue;OledbKey2=someValue; 
See the respective OLEDB provider's connection strings options. The .net OleDbConnection will just pass on the connection string to the specified OLEDB provider. Read more here.