Create Assembly C# Process Xml y Save to DB

Crear Funciones que hagan lo siguiente

1) Functon ProcessXML input parameter folder where there are xml files
2) Functon ProcessXML input parameter file(s) xml.
3) Function ProcessXML input parameter mailbox (smtp,. User, pw)

In 3 options, if there are any zip files , decompress and find xml files.

Output of 3 Functions are :

{
Xml Full (full content xml),
Date, (extract from xml)
DocumentNumber (extract from xml) ,
Proveedor (extract from xml) ,
CUFE (extract from xml)
}

Create Function that receives output of ProcessXML and save to database.
Crear Function that sends to an API and returns status.
Crear Function that query status of process.

Create table with entity framework .net 4.72. c#