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Package.RelationshipExists Method

Indicates whether a package-level relationship with a given ID is contained in the package.

Namespace:  System.IO.Packaging
Assembly:  WindowsBase (in WindowsBase.dll)

public bool RelationshipExists(
	string id


Type: System.String

The Id of the relationship to check for.

Return Value

Type: System.Boolean
true if a package-level relationship with the specified id is in the package; otherwise, false.


id is null.


id is not a valid XML identifier.


The package is not open (Dispose or Close has been called).


The package is write-only.

For additional information, see the Open Packaging Conventions (OPC) specification available for download at http://go.microsoft.com/fwlink/?LinkID=71255.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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