Specifying protocol version using NpgsqlConnection
Connection string
This Npgsql connection string can be used for connections to PostgreSQL.
Server=127.0.0.1;Port=5432;Database=myDataBase;User Id=myUsername;
Password=myPassword;Protocol=3;
This Npgsql connection string can be used for connections to PostgreSQL.
Server=127.0.0.1;Port=5432;Database=myDataBase;User Id=myUsername;
Password=myPassword;Protocol=3;
Valid values for the key Protocol is 2 or 3.