When it is called by trusted applications, returns the directory information for the specified path string.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.String
The path of a file or directory.
In most cases, the string returned by this method consists of all characters in the path up to but not including the last DirectorySeparatorChar or AltDirectorySeparatorChar. If the path consists of a root directory, such as "c:\", null is returned. Note that this method does not support paths using "file:". Because the returned path does not include the DirectorySeparatorChar or AltDirectorySeparatorChar, passing the returned path back into the method will result in the truncation of one folder level per subsequent call on the result string.
Silverlight for Windows PhoneIf you pass an invalid path in GetDirectoryName, the method does not throw an exception. For example, System.IO.Path.GetDirectoryName(@"D:\temp\ .") returns D:\temp instead of throwing an exception. GetDirectoryName also does not throw an exception when the source path is longer than the system-defined maximum path length.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.