添加项目文件。

DB.cs

@@ -0,0 +1,19 @@
+using FreeSql;
+using MegghysAPI.Attributes;
+
+namespace MegghysAPI
+{
+    public static class DB
+    {
+        public static IFreeSql SQL { get; private set; }
+        [AutoInit(Order = 0)]
+        internal static void InitDB()
+        {
+            SQL = new FreeSqlBuilder()
+            .UseConnectionString(DataType.PostgreSQL, Config.Instance.DBConnectString)
+            .UseAutoSyncStructure(true)
+            .Build();
+            SQL.UseJsonMap();
+        }
+    }
+}