Summary
    Gets a directory representing a root directory.
    
		- Assembly
 - Wyam
.Common .dll  - Namespace
 - Wyam
.Common .IO  - Containing Type
 - IReadOnlyFileSystem
 
Syntax
IDirectory GetRootDirectory(DirectoryPath path = null)
	Parameters
| Name | Type | Description | 
|---|---|---|
| path | DirectoryPath | 
    The path of the root directory. If this is an absolute path,
    then a directory representing the specified path is returned.
    If it's a relative path, then it will be combined with the
    current root path. If this is null then the base
    root directory is returned.
     | 
					
Return Value
| Type | Description | 
|---|---|
| IDirectory | A root directory. | 
