System.Web.HttpContext httpContext = System.Web.HttpContext.Current;
            Hashtable departmentSalary = (Hashtable)httpContext.Application["DepartmentSalary"];
            try
            {
                if (departmentSalary != null && departmentSalary.ContainsValue(KEYID))
                {
                    throw ServiceException.NewException(MethodBase.GetCurrentMethod().Name + ":该XXXX已有人操作");
                }
                departmentSalary = new Hashtable();
                departmentSalary[httpContext.Session.SessionID] = KEYID;  //初始化当前用户的  sessionid
                httpContext.Application.Lock();
                httpContext.Application["DepartmentSalary"] = departmentSalary;
                httpContext.Application.UnLock();
调用wcf接口
            }
            catch (Exception)
            {
                throw;
            }
            finally
            {
                departmentSalary.Remove(httpContext.Session.SessionID);
                httpContext.Application.Lock();
                httpContext.Application["DepartmentSalary"] = departmentSalary;
                httpContext.Application.UnLock();
            }
mvc wcf 并发提示,存储Application,验证是否有用户在操作
原文:http://www.cnblogs.com/xuxin-1989/p/4815430.html