public class FileSystem
{
    public FileProperties[] ListAll()
    {
	FileProperties[] list = new FileProperties[3];
	list[0].FileName = "abc.xyz";
	list[0].FileType = "xyz";
	list[0].FileSize = "24 KB";
	list[1].FileName = "abc.xyz";
	list[1].FileType = "xyz";
	list[1].FileSize = "25 KB";
	list[2].FileName = "abc.xyz";
	list[2].FileType = "xyz";
	list[2].FileSize = "26 KB";
	return list;
    }

    public String ReadFile(String FileLocation)
    {
	String FileData = "This are the contents of the file";
	//Code to obtain file data from file into 'FileData'.
	return FileData;
    }

    public void WriteFile(String FileLocation, String FileData)
    {
	//Code to write file data from 'FileData' into 'FileLocation'.
    }

    public void DeleteFile(String FileLocation)
    {
	// Code to remove the file from the system.
    }
}