could you add a method to set the table name

[xiaodongcool]

It can be in the form of arguments or variables

such as 
var item = conn.Get<T>(123,tablename:"table001");

or
conn.SetTableName(typeof(T),"table001")
var item = conn.Get<T>(123);

[henkmollema]

No. You can change the table name using the [Table("...")] attribute.