System.Security.Principal.NTAccount.Translate C# (CSharp) Method

        public override IdentityReference Translate(Type targetType)
        {
            if (targetType == null)
            {
                throw new ArgumentNullException(nameof(targetType));
            }
            Contract.EndContractBlock();

            if (targetType == typeof(NTAccount))
            {
                return this; // assumes that NTAccount objects are immutable
            }
            else if (targetType == typeof(SecurityIdentifier))
            {
                IdentityReferenceCollection irSource = new IdentityReferenceCollection(1);
                irSource.Add(this);
                IdentityReferenceCollection irTarget;

                irTarget = NTAccount.Translate(irSource, targetType, true);

                return irTarget[0];
            }
            else
            {
                throw new ArgumentException(SR.IdentityReference_MustBeIdentityReference, nameof(targetType));
            }
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            bool success = false;
            try
            {
                Sid = new SecurityIdentifier(textBoxSid.Text);
                success = true;
            }
            catch (Exception)
            {
            }

            if (!success)
            {
                try
                {
                    NTAccount acct = new NTAccount(textBoxSid.Text);
                    Sid = (SecurityIdentifier)acct.Translate(typeof(SecurityIdentifier));
                    success = true;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(this, ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }

            if (success)
            {
                DialogResult = DialogResult.OK;
                Close();
            }
        }