基于C#实时数据库Pi的快照，归档等查询-Based on a snapshot of real-time database of C# Pi, archiving queries

c#操作多种实时库如PI、麦杰、麦杰V3等，采用接口实现，自己可以追加新的数据库如EDNA、ifix等-c# database operation, such as a variety of real-time PI, James Myers, James Myers V3, etc., using the interface, they can add new databases such as EDNA, ifix, etc.