- 增加 UnitOfWork 静态属性 DebugBeingUsed，用于生产环境监视正在使用中的事务；

FreeSql.DbContext/UnitOfWork/UnitOfWork.cs

@@ -1,6 +1,7 @@
 using SafeObjectPool;
 using System;
 using System.Collections.Generic;
+using System.Collections.Concurrent;
 using System.Data;
 using System.Data.Common;
 using System.Linq;
@@ -14,10 +15,23 @@ namespace FreeSql
         public static readonly AsyncLocal<IUnitOfWork> Current = new AsyncLocal<IUnitOfWork>();
 #endif
 
+        static int _seed;
+        /// <summary>
+        /// 正在使用中的工作单元（调试）
+        /// </summary>
+        public static ConcurrentDictionary<string, UnitOfWork> DebugBeingUsed { get; } = new ConcurrentDictionary<string, UnitOfWork>();
+
         protected IFreeSql _fsql;
         protected Object<DbConnection> _conn;
         protected DbTransaction _tran;
 
+        /// <summary>
+        /// 开启事务后有值，是 UnitOfWork 的唯一标识<para></para>
+        /// 格式：yyyyMMdd_HHmmss_种子id<para></para>
+        /// 例如：20191121_214504_1
+        /// </summary>
+        public string Id { get; private set; }
+
         public UnitOfWork(IFreeSql fsql)
         {
             _fsql = fsql;
@@ -28,6 +42,9 @@ namespace FreeSql
 
         void ReturnObject()
         {
+            if (string.IsNullOrEmpty(this.Id) == false && DebugBeingUsed.TryRemove(this.Id, out var old))
+                this.Id = null;
+
             _fsql.Ado.MasterPool.Return(_conn);
             _tran = null;
             _conn = null;
@@ -66,6 +83,9 @@ namespace FreeSql
                 _tran = IsolationLevel == null ?
                     _conn.Value.BeginTransaction() :
                     _conn.Value.BeginTransaction(IsolationLevel.Value);
+
+                this.Id = $"{DateTime.Now.ToString("yyyyMMdd_HHmmss")}_{Interlocked.Increment(ref _seed)}";
+                DebugBeingUsed.TryAdd(this.Id, this);
             }
             catch
             {