Enter password: ******
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Your MySQL connection id is 11
Server version: 8.0.19 MySQL Community Server - GPL

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mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.03 sec)
kodingwindow@kw:~/csharp$ 

using MySql.Data.MySqlClient;
using System;
namespace Kodingwindow
{
    class Program
    {
        public static void Main(string[] args)
        {
            string dbname = "DB";
            MySqlConnection con = new MySqlConnection("server=localhost;user=root;port=3306;password=passwd");
            MySqlCommand cmd;
            try
            {
                con.Open();
                Console.WriteLine("Connection Established Successfully");
                cmd = new MySqlCommand("DROP DATABASE IF EXISTS " + dbname + "", con);
                cmd.ExecuteNonQuery();

                cmd = new MySqlCommand("CREATE DATABASE "+ dbname + "", con);
                cmd.ExecuteNonQuery();
                Console.WriteLine("Database Created");
                
                Console.WriteLine("\nList of MySQL Databases: ");
                cmd = new MySqlCommand("SHOW DATABASES", con);
                MySqlDataReader dr = cmd.ExecuteReader();
                while (dr.Read())
                {
                    Console.WriteLine(dr[0]);
                }
                dr.Close();
                con.Close();
                Console.WriteLine("\nConnection Released Successfully");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            Console.ReadKey();
        }
    }
}

Connection Established Successfully
Database Created

List of MySQL Databases:
db
information_schema
mysql
performance_schema
sys

Connection Released Successfully

mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| db                 |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)