I need to filter the collection to git the data
what is the problem in expression? How I can Write it
You can write the expression some thing like this "date LIKE '*"& [Current date in Month and year]&"*'"
Check below threads it will help to write the filters and it has examples as well.
https://learn.microsoft.com/en-us/dotnet/api/system.data.datacolumn.expression?view=netframework-4.7.2
https://www.csharp-examples.net/dataview-rowfilter/
I have tested the expression check below screenshots for reference
