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CollectionExtensionsAddOrUpdateTKey, TValue(IDictionaryTKey, TValue, TKey, FuncTKey, TValue) Method

Adds a key/value pair to the IDictionaryTKey, TValue if the key does not already exist, or updates a key/value pair in the IDictionaryTKey, TValue if the key already exists.

Namespace: GSF.Collections
Assembly: GSF.Core (in GSF.Core.dll) Version: 2.4.218-beta+101eee949414e414795e55a6e73d88938f0177b8
Syntax
public static TValue AddOrUpdate<TKey, TValue>(
	this IDictionary<TKey, TValue> dictionary,
	TKey key,
	Func<TKey, TValue> valueFactory
)
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Parameters

dictionary  IDictionaryTKey, TValue
The dictionary to add the key/value pair to if the key does not already exist.
key  TKey
The key to be added or updated.
valueFactory  FuncTKey, TValue
The function used to generate a value for the key.

Type Parameters

TKey
The type of the keys in the dictionary.
TValue
The type of the values in the dictionary.

Return Value

TValue
The value of the key in the dictionary after updating.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IDictionaryTKey, TValue. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also