| CopyObjectRequestUnmodifiedSinceConstraint Property  | 
            Unmodified timestamp threshold----that is for the copy operation to execute, the file's last modified time must be smaller than this property;
            Otherwise return 412 as HTTP code (precondition failed)
            
 
Namespace: Aliyun.OSSAssembly: Aliyun.OSS (in Aliyun.OSS.dll) Version: 2.8.0.0 (2.8.0)
Syntaxpublic Nullable<DateTime> UnmodifiedSinceConstraint { get; set; }Public Property UnmodifiedSinceConstraint As Nullable(Of DateTime)
	Get
	Set
public:
property Nullable<DateTime> UnmodifiedSinceConstraint {
	Nullable<DateTime> get ();
	void set (Nullable<DateTime> value);
}member UnmodifiedSinceConstraint : Nullable<DateTime> with get, set
Property Value
Type: 
NullableDateTime
See Also