获得"乐观并发失败,对象已被修改".在实体框架6身份

Question

当尝试从两个并行线程更新身份时,我收到并IdentityResult包含此错误消息:Optimistic concurrency failure, object has been modified.

我想刷新模型并重试.像这样的东西.

var result = await UserManager.AddClaimAsync(memberIdentity, new Claim("abc", "cde"));
if(!result.Succeeded)
{
   //reload identity or context

   //retry
   await UserManager.AddClaimAsync(memberIdentity, new Claim("abc", "cde"));
}

关于如何重新加载身份或上下文的任何想法？