C# console calling SQL - bad execution while string contains lithuanian letters

Question

My C# Console Applcation:

1:

string CE_ParentName_ = CEReader5[0].ToString(); // get string with lithuanian letters for example "Konsolės". 

if I use Console.WriteLine() , I get correct output in console.

2:

readname.CommandText = "SELECT [ID] FROM [Net7].[dbo].[GroupFilter] WHERE 
[GroupFilterName]='" + CE_ParentName_ + "'"; // I need to find records in my DB with name of that string (1 possible option)

3:

if (NameReader.Read()) { idd = NameReader[0].ToString(); } // if i get any results ar no.2 i need to read them

The point is that no.2 returns zero results if string contains lithuanian letters. If string is w/o lithuanian letters - everything works perfect. Tried everything, you are my last hope folks.

Answer 1

Are Lithuanian characters multibyte? (like Japanese for example) Is the GroupFilterName NVARCHAR or VARCHAR? If it's NVARCHAR, perhaps you need to put N in front of the string.

Eg.

readname.CommandText = "SELECT [ID] FROM [Net7].[dbo].[GroupFilter] WHERE 
[GroupFilterName]=N'" + CE_ParentName_ + "'";

And see asawyer's comment regarding avoiding injection attacks.