C#: if-conditions

We can count numbers, now it's good to know how to write conditions. 
IF means that operation is perfoming under some condition e.g. number a is 5. 
ELSE means other operation under some condition, this command may be missed or you can write it how many you want. 
Conditions write after if or else and into ( ). Operation write into { } and remember that ; you must write into { ;} ! 

Example: 

int a;

a=int.parse(Console.ReadLine());

if (a>10)

{Console.WriteLine("Your number is higher than 10");}

else (a<10)

{Console.WriteLine("Your number is lower than 10");}

Console.ReadKey();