c# out 关键字

int count =0;
//分页
public IQueryable<T> LoadPagerEntities<S>(int pageSize, int pageIndex, out int total,
Func<T, bool> whereLambda, bool isAsc, Func<T, S> orderByLambda)
{
var tempData = db.Set<T>().Where<T>(whereLambda);

total = tempData.Count();

//排序获取当前页的数据
if (isAsc)
{
tempData = tempData.OrderBy<T, S>(orderByLambda).
Skip<T>(pageSize * (pageIndex - 1)).
Take<T>(pageSize).AsQueryable();
}
else
{
tempData = tempData.OrderByDescending<T, S>(orderByLambda).
Skip<T>(pageSize * (pageIndex - 1)).
Take<T>(pageSize).AsQueryable();
}
return tempData.AsQueryable();
}

LoadPagerEntities（xxxx,out count,xxxx）;