CollectionExtensions.TryAdd<TKey,TValue> Method

Reference

Definition

Namespace:: System.Collections.Generic

Assemblies:: netstandard.dll, System.Collections.dll

Assembly:: System.Collections.dll

Assembly:: netstandard.dll

Source:: CollectionExtensions.cs

Source:: CollectionExtensions.cs

Source:: CollectionExtensions.cs

Important

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Tries to add the specified key and value to the dictionary.

public:
generic <typename TKey, typename TValue>
[System::Runtime::CompilerServices::Extension]
 static bool TryAdd(System::Collections::Generic::IDictionary<TKey, TValue> ^ dictionary, TKey key, TValue value);

public static bool TryAdd<TKey,TValue>(this System.Collections.Generic.IDictionary<TKey,TValue> dictionary, TKey key, TValue value);

static member TryAdd : System.Collections.Generic.IDictionary<'Key, 'Value> * 'Key * 'Value -> bool

<Extension()>
Public Function TryAdd(Of TKey, TValue) (dictionary As IDictionary(Of TKey, TValue), key As TKey, value As TValue) As Boolean

Type Parameters

TKey

The type of the keys in the dictionary.

TValue

The type of the values in the dictionary.

Parameters

dictionary: IDictionary<TKey,TValue>

A dictionary with keys of type TKey and values of type TValue.

key: TKey

The key of the value to add.

value: TValue

The value to add.

Returns

Boolean

true when the key and value are successfully added to the dictionary; false when the dictionary already contains the specified key, in which case nothing gets added.

Exceptions

ArgumentNullException

dictionary is null.

Applies to

Product	Versions
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Standard	2.1

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