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IsolatedStorage.UsedSize Property

When overridden in a derived class, gets a value that represents the amount of the space used for isolated storage.

Namespace:  System.IO.IsolatedStorage
Assembly:  mscorlib (in mscorlib.dll)

public virtual long UsedSize { get; }

Property Value

Type: System.Int64
The used amount of isolated storage space, in bytes.


An operation was performed that requires access to UsedSize, but that property is not defined for this store. Stores that are obtained by using enumerations do not have a well-defined UsedSize property, because partial evidence is used to open the store.

The IsolatedStorageFile.UsedSize property overrides this property.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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