我已经在c＃应用程序中编写了一个linq查询，以获取auth用户所属的应用程序的名称

var authApplicationRepository = AuthApplicationRepository.GetallAsList();
var authUserRepository = AuthUserRepository.GetallAsList();

您认为将这两行结合起来是更好，更短的方法

//Get the name of the application the auth user belongs to
var authUserapplicationid = authUserRepository
                            .Where(x => x.Id == userChangeRequest.AuthUserId)
                            .Select(x => x.applicationid)
                            .FirstOrDefault();

var authUserApplicationName = authApplicationRepository
                              .Where(x => x.Id == authUserapplicationid)
                              .Select(x => x.Description)
                              .FirstOrDefault();