Dear Hersh Mustafa,

To do so, please refer to the attached links.

http://stackoverflow.com/questions/35968653/pass-2d-array-from-c-sharp-to-postgresql-function

http://www.codeguru.com/columns/dotnet/postgres-tricks-in-.net.html

Dear Hojjat

thanks for your links, but  "NpgsqlTypes" does not support of (NpgsqlDbType.Array) on my computer.

What is solution for this error

To address the problem please check namespace and includes of your codes. Please also see the attached link which describes a more complete example.

http://stackoverflow.com/questions/21146606/npgsql-arrays-and-c-sharp-the-operator-does-not-exist-text-text