| DownloadObjectRequestModifiedSinceConstraint Property  | 
            Gets or sets "If-Modified-Since".
            
 
Namespace: Aliyun.OSSAssembly: Aliyun.OSS (in Aliyun.OSS.dll) Version: 2.8.0.0 (2.8.0)
Syntaxpublic Nullable<DateTime> ModifiedSinceConstraint { get; set; }Public Property ModifiedSinceConstraint As Nullable(Of DateTime)
	Get
	Set
public:
property Nullable<DateTime> ModifiedSinceConstraint {
	Nullable<DateTime> get ();
	void set (Nullable<DateTime> value);
}member ModifiedSinceConstraint : Nullable<DateTime> with get, set
Property Value
Type: 
NullableDateTime
Remarks
            It means if its value is smaller the actual last modified time, the file will be downloaded. 
            Otherwise, return precondition failed (412).
            
See Also