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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

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)

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