C# Definition:

[StructLayout(LayoutKind.Sequential)]
public struct UNICODE_STRING : IDisposable
{
   public ushort Length;
   public ushort MaximumLength;
   private IntPtr buffer;

   public UNICODE_STRING(string s)
   {
     Length = (ushort)(s.Length * 2);
     MaximumLength = (ushort)(Length + 2);
     buffer = Marshal.StringToHGlobalUni(s);
   }

   public void Dispose()
   {
     Marshal.FreeHGlobal(buffer);
     buffer = IntPtr.Zero;
   }

   public override string ToString()
   {
     return Marshal.PtrToStringUni(buffer);
   }
}

VB.NET Definition:

<StructLayout(LayoutKind.Sequential)> _
Private Structure UNICODE_STRING
    Public Length As UShort
    Public MaximumLength As UShort
    <MarshalAs(UnmanagedType.LPWStr)> _
    Private buffer As String

    Public Sub New(s As String)
       Length = CUShort(s.Length * 2)
       MaximumLength = CUShort(Length + 2)
       buffer = s
    End Sub

    Public Overrides Function ToString() As String
       Return buffer
    End Function
End Structure

User-Defined Field Types:

None.

Notes:

None.

cf. NtOpenDirectoryObject, NtOpenSymbolicLinkObject

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