How can I easily convert DataReader to List? [duplicate]

Answer 1

I would (and have) started to use Dapper. To use your example would be like (written from memory):

public List GetCustomerList()
{
    using (DbConnection connection = CreateConnection())
    {
        return connection.Query("procToReturnCustomers", commandType: CommandType.StoredProcedure).ToList();
    }
}

CreateConnection() would handle accessing your db and returning a connection.

Dapper handles mapping datafields to properties automatically. It also supports multiple types and result sets and is very fast.

Query returns IEnumerable hence the ToList().