CacheTKey, TValueTryGetValue Method

public bool TryGetValue(
	TKey key,
	out TValue value
)

Public Function TryGetValue ( 
	key As TKey,
	<OutAttribute> ByRef value As TValue
) As Boolean

public:
virtual bool TryGetValue(
	TKey key, 
	[OutAttribute] TValue% value
) sealed

abstract TryGetValue : 
        key : 'TKey * 
        value : 'TValue byref -> bool 
override TryGetValue : 
        key : 'TKey * 
        value : 'TValue byref -> bool 

Parameters

key  TKey

The key whose value to get.

value  TValue

When this method returns, the value associated with the specified key, if the key is found; otherwise, the default value for the type of the value parameter. This parameter is passed uninitialized.

Return Value

Implements

Use this method if the CacheTKey, TValue was initialized without an item loader, or when you want to determine if a key exists in the CacheTKey, TValue and if so, you want to get the value as well. Reading the indexer property would transparently load a non-existing element by calling the item loader delegate that was passed to the constructor.

Works exactly the same way as in case of DictionaryTKey, TValue class. If key is not found, does not use the item loader passed to the constructor.

If the key is not found, then the value parameter gets the appropriate default value for the type TValue; for example, 0 (zero) for integer types, for Boolean types, and for reference types.

This method approaches an O(1) operation.

Reference