Add Examples

Add a new key/value pair to a dictionary object.

Dictionary<TKey, TValue> methodDictionary = new Dictionary<TKeym TValue>();
   methodDictionary.Add(key1, value1);
   methodDictionary.Add(key2, value2);
   methodDictionary.Add(key3, value3);

Let’s create a dictionary with the planets and the number of moons.

Example

Dictionary<string, int> moons = new Dictionary<string, int>();
   moons.Add("Mercury", 0);
   moons.Add("Venus", 0);
   moons.Add("Earth", 1);
   moons.Add("Mars", 2);
   moons.Add("Jupiter", 79);
   moons.Add("Saturn", 82);
   moons.Add("Uranus", 27);
   moons.Add("Neptune", 14);

foreach(KeyValuePair<string,int> moon in moons)
{
   Console.WriteLine(moon);
}

Output

[Mercury, 0]
[Venus, 0]
[Earth, 1]
[Mars, 2]
[Jupiter, 79]
[Saturn, 82]
[Uranus, 27]
[Neptune, 14]

//oops forgot Pluto

moons.Add("Pluto", 5);

foreach(KeyValuePair<string,int> moon in moons)
{
   Console.WriteLine(moon);
}

Output

[Mercury, 0]
[Venus, 0]
[Earth, 1]
[Mars, 2]
[Jupiter, 79]
[Saturn, 82]
[Uranus, 27]
[Neptune, 14]
[Pluto, 5]