Lookup<TKey,TElement>.Contains(TKey) Method
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Determines whether a specified key is in the Lookup<TKey,TElement>.
public:
virtual bool Contains(TKey key);public bool Contains (TKey key);abstract member Contains : 'Key -> bool
override this.Contains : 'Key -> boolPublic Function Contains (key As TKey) As Boolean- key
- TKey
The key to find in the Lookup<TKey,TElement>.
true if key is in the Lookup<TKey,TElement>; otherwise, false.
The following example demonstrates how to use Contains to determine whether a Lookup<TKey,TElement> contains a specified key. This code example is part of a larger example provided for the Lookup<TKey,TElement> class.
// Determine if there is a key with the value 'G' in the Lookup.
bool hasG = lookup.Contains('G');
' Determine if there is a key with the value 'G' in the Lookup.
Dim hasG As Boolean = lookup.Contains("G"c)
| Proizvod | Verzije |
|---|---|
| .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 | 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 |
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