.net - 为什么我不能将匿名类型作为参数传递给函数？

Question

我试图做类似下面的事情，但它不起作用。为什么.NET 不允许我这样做？

private void MyFunction(var items)
{
 //whatever
}

Answer 1

Beginning in Visual C# 3.0, variables that are declared at method scope can have an implicit type var. An implicitly typed local variable is strongly typed just as if you had declared the type yourself, but the compiler determines the type. The following two declarations of i are functionally equivalent:

var i = 10; // implicitly typed
int i = 10; //explicitly typed

换句话说， var关键字只允许用于局部范围的变量。

Source .

更多信息 here .基本上，当使用 var您还必须将变量初始化为同一行上的一个值，以便编译器知道它是什么类型。