SafeTokenHandle.cs

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using System;
using System.Runtime.InteropServices;
 
namespace Microsoft.Win32.SafeHandles;
 
internal sealed class SafeTokenHandle : SafeHandle
{
    public override bool IsInvalid
    {
        get
        {
            if (!(handle == new IntPtr(0)))
            {
                return handle == new IntPtr(-1);
            }
            return true;
        }
    }
 
    public SafeTokenHandle()
        : base(IntPtr.Zero, ownsHandle: true)
    {
    }
 
    internal SafeTokenHandle(IntPtr handle)
        : base(IntPtr.Zero, ownsHandle: true)
    {
        SetHandle(handle);
    }
 
    protected override bool ReleaseHandle()
    {
        return global::Interop.Kernel32.CloseHandle(handle);
    }
}