Choices in C# .NET

To Choices in C# .NET conditional operator, if statement, switch statement are used:

greeting = age < 20 ? "What's up?" : "Hello";
if (age < 20)
  greeting = "What's up?";
else
  greeting = "Hello"; 
// Multiple statements must be enclosed in {}
if (x != 100 && y < 5) {   
  x *= 5;
  y *= 2;
}

No need for _ or : since ; is used to terminate each statement.

if (x > 5) 
  x *= y; 
else if (x == 5) 
  x += y; 
else if (x < 10) 
  x -= y; 
else 
  x /= y;

// Every case must end with break or goto case 
switch (color) {                          // Must be integer or string
  case "pink":
  case "red":    r++;    break; 
  case "blue":   b++;   break;
  case "green": g++;   break;
  default:    other++;   break;       // break necessary on default
}