Finds the number of elements that match a specified key.
public: int count(TKey _Keyval);
public int count (TKey _Keyval);
abstract member count : 'Key -> int
Public Function count (_Keyval As TKey) As Integer
The key value for which to search.
The number of elements in the controlled sequence that have the same key as
_Keyval. You use it to determine the number of elements currently in the controlled sequence that match a specified key.