1- C# is case sensitive, so myVariable is not the same as MyVariable
2- The entry point of the program by default returns void (You can change that into an integer if you insist on your program returning a zero for ok or an error code), it takes string[] args as parameter so that you can pass the program command line arguments
3- No globals
4- Command line arguments will be in the array, you can then foreach around them (Or use a for loop) to extract them
5- You can use GetCommandLineArgs() to get the array we talked about in 4, this method is static, you can learn what static is later

Will add things here as suitable as i go.