Contains(String) Method (CompositeDataStorage)

In This Topic

Determines whether the data storage contains an item with the specified identifier.

Syntax

'Declaration

Public Function Contains( _
   ByVal keyThe item key.
 As String _
) As Boolean

public bool Contains(
   string key
)

public: bool Contains(
   string* key
)

public:
bool Contains(
   string^ key
)

True if data storage contains this item;
false if data storage not contains this item.

Exceptions

Exception	Description
System.ArgumentNullException	Thrown if key is null or empty.
System.ObjectDisposedException	Thrown if this instance is disposed.

Requirements

Target Platforms: .NET 10; .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

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