Question

I need to add a \ symbol to a string.

I can’t find the way to do that, because

@"\" == "\\"

\ is not the correct statement.

EDIT

Actually I am trying to generate SQL query string which contains the ' character. In order to SQL reads it correctly I should represent it like \'. So, my code is something like this:

string query = "SELECT somequery";
query += "\\'";

But when SQL try to execute this query it thinks that query contains exactly \ \\'.

Answer 1

Are you trying to escape the apostrophe (‘) in a SQL string literal? Replace it by two apostrophes (”). The backslash applies to C#, not to SQL.

"WHERE text = 'don''t'"

EDIT:

May be you are looking for:

query = "SELECT * FROM tbl WHERE text = '" + input.Replace("'","''") + "'";

But consider using SQL parameters in this case, instead of using string operations.

---

The backslash needs no escaping in SQL:

SELECT * FROM tbl WHERE text = '\'