Practical .NET

With the MySQL Connector/.NET, parameterized queries are performed like this:
dim sql as string = "SELECT * FROM table1 WHERE field1 = ?field1"

cmd.Parameters.Add("?field1", "Value")


Great.  What about LIKE statements?

dim sql as string = "SELECT * FROM table1 WHERE field1 like ?field1"

cmd.Parameters.Add("?field1", "Value")


The only way I've gotten this to work is:

dim sql as string = "SELECT * FROM table1 WHERE value1 like ?value1"

cmd.Parameters.add("?value1", "%Value%")

Am I missing something?