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XamlType.LookupIsNullable Method

Returns a value that indicates whether this XamlType represents a nullable type, as per the XAML definition.

Namespace:  System.Xaml
Assembly:  System.Xaml (in System.Xaml.dll)

protected virtual bool LookupIsNullable()

Return Value

Type: System.Boolean
true if this XamlType represents a nullable type; otherwise, false.

This method can be invoked by calls to IsNullable.

The default implementation makes a determination based on the CLR core library nullable concept, checked against UnderlyingType. For a null UnderlyingType, it returns true.

Override this method if you want IsNullable to use different logic.

.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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