Restructure data access layer/data layer

DataAccessLayer/Sql/DatabaseHelper.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Data;
+using Microsoft.Data.SqlClient;
+
+namespace DataAccessLayer.Sql
+{
+    public class DatabaseHelper
+    {
+        private readonly string _connectionString;
+
+        public DatabaseHelper(string connectionString)
+        {
+            _connectionString = connectionString;
+        }
+
+        public void ExecuteRawSql(string query)
+        {
+            try
+            {
+                using (
+                    SqlConnection connection = new SqlConnection(
+                        _connectionString
+                    )
+                )
+                {
+                    connection.Open();
+
+                    using (
+                        SqlCommand command = new SqlCommand(query, connection)
+                    )
+                    {
+                        command.CommandType = CommandType.Text;
+
+                        using (SqlDataReader reader = command.ExecuteReader())
+                        {
+                            while (reader.Read())
+                            {
+                                for (int i = 0; i < reader.FieldCount; i++)
+                                {
+                                    Console.WriteLine(
+                                        $"{reader.GetName(i)}: {reader.GetValue(i)}"
+                                    );
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"An error occurred: {ex.Message}");
+            }
+        }
+    }
+}