1. output
Console.WriteLine("hello world");
2. naming convention
variable: start with lower-case, use camel-case
double thePrice = 14.95;
for the rest (class name, method name, const): start with upper-case, use camel-case
const int HomeRunRecord = 61;
3. value type
similar to primitive in jave
for example: int, float, bool
原文：http://www.cnblogs.com/phoenix13suns/p/5140994.html