I'm using MySQL and LLBLGEN version 3.5 Final (November 6th, 2012).

Actually, when I search for a customer, if this customer has an accent in its name, this customer isn't found. To be able to find it, in SQL, I can use the collate function. So,

SELECT *
FROM customer
WHERE name LIKE 'RÖS%' collate utf8_general_ci

will return the 'ROTNER' customer but also the 'RÖSNER' customer.

How can I do it in Linq?

You can collate the expression if you use DBFuncionCalls with constant. The following thread is an example for case-insensitive, but it's similar: http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=12216&StartAtMessage=0&#67837

OK thanks