Copies the object if it has been modified since the specified time, otherwise returns a PreconditionFailed.
Declaration Syntax| C# |
public DateTime ModifiedSinceDate { get; set; }
Remarks
Copies the object if it has been modified since the
specified time; otherwise returns a 412 (failed condition).
Constraints: This property can be used with ETagToNotMatch,
but cannot be used with other conditional copy properties.