When it is called by trusted applications, creates all directories and subdirectories as specified by path.
Assembly: mscorlib (in mscorlib.dll)
The directory specified by path is read-only.
The caller does not have the required permission.
path is a zero-length string, contains only white space, or contains one or more invalid characters.
path is prefixed with, or contains only a colon character (:).
path is null.
The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters and file names must be less than 260 characters.
The specified path is invalid (for example, it is on an unmapped drive).
path contains a colon character (:) that is not part of a drive label ("C:\").
Silverlight for Windows PhoneThis member has a SecurityCriticalAttribute attribute on Silverlight for Windows Phone, because the attribute was present in Silverlight 3. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.