int type int

I get the int and store it in n. The switch statement takes inside its parenthesis an int or a char or some primitive type.

我得到一个整数并把它存储，到n中，switch语句的圆括号里可以是一个整数，或者一个字符或其他的基本类型。

Type: Gets the static type of the expression. In this case, the expression is of type Func<int, int, int>.

Type：得到表达式的静态类型，在本例中，表达式的类型是Func<int, int, int>。

If the first two arguments to find are of type int* and the third is of type int, then it is as if you had called the following function.

如果前面两个参数类型是int*，第三个参数类型是int，那么就像调用下面的函数一样。