Dictionary<TKey, TValue>.Count Property
Gets the number of key/value pairs contained in the Dictionary<TKey, TValue>.
Assemblies: mscorlib (in mscorlib.dll)
System.Collections (in System.Collections.dll)
The capacity of a Dictionary<TKey, TValue> is the number of elements that the Dictionary<TKey, TValue> can store. The property is the number of elements that are actually in the Dictionary<TKey, TValue>.
The capacity is always greater than or equal to . If exceeds the capacity while adding elements, the capacity is increased by automatically reallocating the internal array before copying the old elements and adding the new elements.
Getting the value of this property is an O(1) operation.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.