Incorrect syntax near the keyword 'User'

Question

The error is:

An unhandled exception of type \'System.Data.SqlClient.SqlException\' occurred in System.Data.dll
Additional information: Incorrec

Answer 1

"User" is a reserved word in SQL Server, so you have to use a delimited identifier to refer to your table. Try

SqlCommand command4 = new SqlCommand("SELECT * FROM [User]", conn);

instead... or rename the table to something which isn't reserved.

(I'd also strongly advise you to keep the data access out of your UI code, dispose of connections properly etc... but that's a different matter.)