Unique Key Violation in SQL Server - Is it safe to assume Error 2627?

Question

I need to catch violation of UNIQUE constraints in a special way by a C# application I am developing. Is it safe to assume that Error 2627 will always correspond to a violation of this kind, so that I can use

if (ThisSqlException.Number == 2627)
{
    // Handle unique constraint violation.
}
else
{
    // Handle the remaing errors.
}

?

Answer 1

2627 is unique constraint (includes primary key), 2601 is unique index

SELECT * FROM sys.messages
WHERE text like '%duplicate%' and text like '%key%' and language_id = 1033