The default column width is the width of all columns which do not have their width set.
The value assigned must be between 0 and 65535. Invalid values will be automatically adjusted to valid values.
Setting or getting this property is equivalent to calling SetDefaultColumnWidth(Double,WorksheetColumnWidthUnit) or GetDefaultColumnWidth using the WorksheetColumnWidthUnit value of Character256th.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+