. Net get all the files that know the file quota and the quota except the specified file quota

/** // <Summary>
/// Obtain all the sub-files in the object category
/// </Summary>
String files = "";
Public string GetFiles (string dir)
{
DirectoryInfo dif = new DirectoryInfo (dir );

Int n = dif. GetFiles ("*. txt"). Length;

If (n> = 1)
{
Foreach (FileInfo fi in dif. GetFiles ("*. txt "))
{
Files + = fi. FullName. Trim () + "/";
}
}

Foreach (string di in Directory. GetDirectories (dir) // subfile catalog
{
GetFiles (di );
}
Return files;
}

/** // <Summary>
/// Except all the sub-files of the specified destination
/// </Summary>
/// <Param name = "dir"> </param>
Public void DeleteFiles (string dir)
{
DirectoryInfo dif = new DirectoryInfo (dir );

Int n = dif. GetFiles ("*"). Length;

If (n> = 1)
{
Foreach (FileInfo fi in dif. GetFiles ("*"))
{
File. Delete (fi. FullName );
}
}

Foreach (string di in Directory. GetDirectories (dir) // subfile catalog
{
DeleteFiles (di );
}

Directory. Delete (dir );

}