public void Dicitonary()
{
var people = new Dictionary<string, Person>();
var matteo = new Person
{
Name = "Matteo",
Age = 12
};
var valerio = new Person
{
Name = "Valerio",
Age = 13
};
people.Add(matteo.Name, matteo);
people.Add(valerio.Name, valerio);
//people.Add(valerio.Name, valerio.Age); // <-- compile-time error! it is type safe!
foreach (var key in people.Keys)
{
Console.WriteLine("{0} is {1} years old.", key, people[key].Age);
}
}
// Insert only Person objects.
public void AddPerson(Person p)
{
arPeople.Add(p);
}
static void Main(string[] args)
{
// Example 1
// Collection of strings
// ########################################
// Create a collection
var colours = new List<string>();
// Add items to the collection
colours.Add("Red");
colours.Add("Green");
colours.Add("Blue");
Console.WriteLine("Strings:");
// Send the results to standard output
for (int i = 0; i < colours.Count; i++)
{
Console.WriteLine(" " + colours[i]);
}
// Blank line
Console.WriteLine();
// Example 2
// Collection of ints
// ########################################
// Create a collection
var grades = new List<int>();
// Add items to the collection
grades.Add(78);
grades.Add(68);
grades.Add(72);
grades.Add(83);
grades.Add(79);
// Can do a "for" loop, like above, or
// can do a "foreach" loop
Console.WriteLine("Numbers:");
var total = 0;
foreach (var item in grades)
{
Console.WriteLine(string.Format(" Processing grade {0}", item));
total += item;
}
// Some results
Console.WriteLine(string.Format(" Average: {0}", (total / grades.Count)));
Console.WriteLine(string.Format(" Highest grade: {0}", grades.Max()));
// Blank line
Console.WriteLine();
// Example 3
// Collection of Person objects
// ########################################
// Create a collection
var teachers = new List<Person>();
// Add items to the collection
var peter = new Person();
peter.Name = "Peter McIntyre";
peter.Age = 39;
teachers.Add(peter);
var wei = new Person { Name = "Wei Song", Age = 35 };
teachers.Add(wei);
teachers.Add(new Person { Name = "Ian Tipson", Age = 41 });
// Output
Console.WriteLine("Objects:");
foreach (var item in teachers)
{
// Using the new C# 6.0 interpolated strings feature
// https://msdn.microsoft.com/en-us/library/dn961160.aspx
Console.WriteLine($" Teacher {item.Name} is {item.Age} years old.");
}
// Blank line
Console.WriteLine();
}