添加项目文件。

TelegramService.Entity/Db.cs

@@ -0,0 +1,28 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace TelegramService.Entity
+{
+    public class Db
+    {
+
+        /// <summary>
+        /// 数据库连接
+        /// </summary>
+        public static SqlSugarClient dbConnection
+        {
+            get
+            {
+                
+                return new SqlSugarClient(new ConnectionConfig()
+                {
+                    ConnectionString = Appsettings.Conf.ConnectionStrings.DBConnection,//连接符字串
+                    DbType = SqlSugar.DbType.MySql, //数据库类型
+                    IsAutoCloseConnection = true //不设成true要手动close
+                });
+            }
+        }
+    }
+}