C# WPF中 SecureString 转 String

这段代码是用于WPF控件中的PasswordBox的SecureString解密为明文

这个地方的代码我想起来了，来自Youtuber：AngleSix，各位嘤语好可以去康康他的Youtube视频,之前我在初学WPF的时候就看他视频，受益匪浅~

public static string UnSecure(this SecureString secureString)
        {
            //Make sure we have a secure string 
            if (secureString == null)
            {
                return string.Empty;
            }
            //Get a pointer for an unsecure string in memory
            var unmanagedString = IntPtr.Zero;
            try
            {
                //Unsecures the password
                unmanagedString = Marshal.SecureStringToGlobalAllocUnicode(secureString);
                return Marshal.PtrToStringUni(unmanagedString);
            }
            finally
            {
                //Clean up any memory allocation
                Marshal.ZeroFreeGlobalAllocUnicode(unmanagedString);
            }
        }