.NET Framework Dictionaries ContainsKey(TKey)
Example
To check if a Dictionary has an specifique key, you can call the method ContainsKey(TKey) and provide the key of TKey type. The method returns a bool value when the key exists on the dictionary. For sample:
var dictionary = new Dictionary<string, Customer>()
{
{"F1", new Customer() { FirstName = "Felipe", ... } },
{"C2", new Customer() { FirstName = "Carl", ... } },
{"J7", new Customer() { FirstName = "John", ... } },
{"M5", new Customer() { FirstName = "Mary", ... } },
};
And check if a C2 exists on the Dictionary:
if (dictionary.ContainsKey("C2"))
{
// exists
}
The ContainsKey method is available on the generic version Dictionary<TKey, TValue>.
