Contains(String) Method (IDataStorage)

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
)

Parameters

key: The item key.

Return Value

True - the data storage contains an item with the specified identifier; false - the data storage does NOT contain an item with the specified identifier.

Exceptions

Exception	Description
System.ArgumentNullException	If key is null.

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

Reference

IDataStorage Interface
IDataStorage Members

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