Dictionary<TKey,TValue>.ContainsValue(TValue) Method

Definition

Determines whether the Dictionary<TKey,TValue> contains a specific value.

C#
public bool ContainsValue(TValue value);

Parameters

value
TValue

The value to locate in the Dictionary<TKey,TValue>. The value can be null for reference types.

Returns

true if the Dictionary<TKey,TValue> contains an element with the specified value; otherwise, false.

Remarks

This method determines equality using the default equality comparer EqualityComparer<T>.Default for TValue, the type of values in the dictionary.

This method performs a linear search; therefore, the average execution time is proportional to Count. That is, this method is an O(n) operation, where n is Count.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP 10.0

See also