CSharpTest.Net
GetOrAdd Method
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CSharpTest.Net.Library Assembly > CSharpTest.Net.Collections Namespace > BTreeDictionary<TKey,TValue> Class : GetOrAdd Method

key
The key of the element to add.
value
The value to be added, if the key does not already exist.

Glossary Item Box

Adds a key/value pair to the IDictionary if the key does not already exist.

Syntax

Visual Basic (Declaration) 
Public Function GetOrAdd( _
   ByVal key As TKey, _
   ByVal value As TValue _
) As TValue
C# 
public TValue GetOrAdd( 
   TKey key,
   TValue value
)

Parameters

key
The key of the element to add.
value
The value to be added, if the key does not already exist.

Exceptions

ExceptionDescription
System.NotSupportedExceptionThe IDictionary is read-only.

Example

Library/Library.Test/TestBTreeDictionary.cs

C#Copy Code
BTreeDictionary<int, string> data = new BTreeDictionary<int, string>(Comparer);
Assert.AreEqual("a", data.GetOrAdd(1, "a"));
Assert.AreEqual("a", data.GetOrAdd(1, "b"));
VB.NETCopy Code
Dim data As New BTreeDictionary(Of Integer, String)(Comparer)
Assert.AreEqual("a", data.GetOrAdd(1, "a"))
Assert.AreEqual("a", data.GetOrAdd(1, "b"))

Requirements

Target Platforms: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7

See Also

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