How do I append a 'where' clause using VB.NET and LINQ?

Question

I am pretty new to VB.NET and am having a bit of trouble here with something I thought should be simple.

Keeping it simple, let\'s say I have a Document table with \

Answer 1

Dim query = From document In _context.Documents where document.name = 'xpto' select document 

Or

Dim query = From document In _context.Documents where document.name.contains('xpto') select document