此浏览器不再受支持。
请升级到 Microsoft Edge 以使用最新的功能、安全更新和技术支持。
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets a value that's always -1.
public: property long Length { long get(); };
public long Length { get; }
member this.Length : int64
Public ReadOnly Property Length As Long
-1.
.NET
