Dictionary<TKey, TValue>.Remove Method (TKey)
.NET Framework (current version)
Removes the value with the specified key from the Dictionary<TKey, TValue>.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- key
-
Type:
TKey
The key of the element to remove.
Return Value
Type: System.Booleantrue if the element is successfully found and removed; otherwise, false. This method returns false if key is not found in the Dictionary<TKey, TValue>.
Implements
IDictionary<TKey, TValue>.Remove(TKey)| Exception | Condition |
|---|---|
| ArgumentNullException | key is null. |
If the Dictionary<TKey, TValue> does not contain an element with the specified key, the Dictionary<TKey, TValue> remains unchanged. No exception is thrown.
This method approaches an O(1) operation.
The following code example shows how to remove a key/value pair from a dictionary using the Remove method.
This code example is part of a larger example provided for the Dictionary<TKey, TValue> class (openWith is the name of the Dictionary used in this example).
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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