asp.net-identity交易问题

做那样的事情：

var dbContext = // get instance of your ApplicationDbContext
var userManager = // get instance of your ApplicationUserManager
using (var transaction = dbContext.Database.BeginTransaction(IsolationLevel.ReadCommitted))
{
    try
    {
        var user = // crate your ApplicationUser
        var userCreateResult = await userManger.CreateAsync(user,password);
        if(!userCreateResult.Succeeded)
        {
            // list of errors in userCreateResult.Errors
            transaction.Rollback();
            return userCreateResult.Errors;
        }
        // new Guid for user now saved to user.Id property
        var userId = user.Id;

        var addToRoleresult = await userManager.AddToRoleAsync(user.Id,"My Role Name");
        if(!addToRoleresult.Succeeded)
        {
            // deal with errors
            transaction.Rollback();
            return addToRoleresult.Errors;
        }

        // if we got here,everything worked fine,commit transaction
        transaction.Commit();
    }
    catch (Exception exception)
    {
        transaction.Rollback();
        // log your exception
        throw;
    }
}

希望这可以帮助.