Created Async Await (markdown)

Async-Await.md

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+
+
+### 整个项目采用异步的方法：
+
+比如异步仓储 
+
+```
+  public async Task<TEntity> QueryById(object objId, bool blnUseCache = false)
+  {
+      //return await Task.Run(() => _db.Queryable<TEntity>().WithCacheIF(blnUseCache).InSingle(objId));
+      return await _db.Queryable<TEntity>().WithCacheIF(blnUseCache).In(objId).SingleAsync();
+  }
+
+```
+比如异步服务
+
+```
+  public async Task<TEntity> QueryById(object objId)
+  {
+      return await BaseDal.QueryById(objId);
+  }
+
+
+```
+
+异步接口
+
+```
+  public async Task<MessageModel<PageModel<Module>>> Get(int page = 1, string key = "")
+  {
+      if (string.IsNullOrEmpty(key) || string.IsNullOrWhiteSpace(key))
+      {
+          key = "";
+      }
+      int intPageSize = 50;
+
+      var data = await _moduleServices.QueryPage(a => a.IsDeleted != true && (a.Name != null && a.Name.Contains(key)), page, intPageSize, " Id desc ");
+
+      return new MessageModel<PageModel<Module>>()
+      {
+          msg = "获取成功",
+          success = data.dataCount >= 0,
+          response = data
+      };
+
+  }
+
+
+```