c# - 在 LINQ to SQL C# 中选择计数

Question

如何使用 COUNT 编写 LINQ to SQL？

例子:

var purch = from purchase in myBlaContext.purchases
            select purchase;

我怎样才能得到这里的计数？

Answer 1

像那样

var purchCount = (from purchase in myBlaContext.purchases select purchase).Count();

甚至更简单

var purchCount = myBlaContext.purchases.Count();