Dictionary(Of TKey, TValue).KeyCollection.ICollection(Of TKey).Contains Method (TKey)
Determines whether the ICollection(Of T) contains a specific value.
Assembly: mscorlib (in mscorlib.dll)
Private Function Contains ( item As TKey ) As Boolean Implements ICollection(Of TKey).Contains
Parameters
- item
-
Type:
TKey
The object to locate in the ICollection(Of T).
Implements
ICollection(Of T).Contains(T)Implementations can vary in how they determine equality of objects; for example, List(Of T) uses Default, whereas, Dictionary(Of TKey, TValue) allows the user to specify the IComparer(Of T) implementation to use for comparing keys.
This method is an O(1) operation.
Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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