Override this method to measure the size of a window.
protected override Size MeasureOverride(
Parameters availableSize Type: System.Windows .Size
that reflects the available size that this window can give to the child. Infinity can be given as a value to indicate that the window will size to whatever content is available. Size Return Value
System.Windows .Size A that reflects the size that this window determines it needs during layout, based on its calculations of children's sizes. Size .NET Framework
Supported in: 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.