OpenXmlPackage.CanSave Property    
Definition
Important
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Gets a value indicating whether saving the package is supported by calling Save(). Some platforms (such as .NET Core), have limited support for saving.
If false, in order to save, the document and/or package needs to be fully closed and disposed and then reopened.
public static bool CanSave { get; }public bool CanSave { get; }static member CanSave : boolmember this.CanSave : boolPublic Shared ReadOnly Property CanSave As BooleanPublic ReadOnly Property CanSave As Boolean