Some Fix

Samples/Modbus.Net.Modbus.Test/DatabaseWrite.cs

@@ -0,0 +1,36 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using System.ComponentModel.DataAnnotations;
+
+
+namespace Modbus.Net.Modbus.Test
+{
+    public class DatabaseWriteContext : DbContext
+    {
+        static readonly string connectionString = new ConfigurationBuilder().AddJsonFile($"appsettings.json").Build().GetConnectionString("DatabaseWriteConnectionString")!;
+
+        public DbSet<DatabaseWriteEntity> DatabaseWrites { get; set; }
+
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            optionsBuilder.UseMySql(connectionString, ServerVersion.AutoDetect(connectionString));
+        }
+    }
+
+    public class DatabaseWriteEntity
+    {
+        [Key]
+        public int Id { get; set; }
+        public double? Value1 { get; set; }
+        public double? Value2 { get; set; }
+        public double? Value3 { get; set; }
+        public double? Value4 { get; set; } 
+        public double? Value5 { get; set; }
+        public double? Value6 { get; set; }
+        public double? Value7 { get; set; }
+        public double? Value8 { get; set; }
+        public double? Value9 { get; set; }
+        public double? Value10 { get; set; }
+        public DateTime UpdateTime { get; set; }
+    }
+}