demo.cs

using System;
using java.lang;
using java.sql;

namespace cdb2cs
{
    internal static class Program
    {
        // Force type reference. Otherwise, the class will not be loaded.
        // cdb2jdbc also doesn't offer an EmbeddedDriver, which would make this
        // easier.
        private static readonly Type foobar = typeof(com.bloomberg.comdb2.jdbc.Driver);

        public static void Main()
        {
            Class.forName("com.bloomberg.comdb2.jdbc.Driver");

            var conn = DriverManager.getConnection("jdbc:comdb2://localhost/testdb");

            var stmt = conn.createStatement();
            var rs = stmt.executeQuery("SELECT 1+1 as \"math\"");
            
            while (rs.next())
            {
                Console.WriteLine($"Result is {rs.getInt(1)}\n");
            }

            rs.close();
            stmt.close();
        }
    }
}