C#

string unixStampString="1241771674";
int unixStamp;
if (int.TryParse(unixStampString, out unixStamp)) {
    DateTime dt=new DateTime(1970, 1, 1).AddSeconds(unixStamp);
    Console.WriteLine(dt.ToString());
} else {
    Console.WriteLine("Input error");
}

While(true)
{
    Your server code goes here;
}

uint u;
return unchecked((int)u);

int i;
return unchecked((uint)i);

public void MyCaller() {
  string[] aMyArray = ...
  this.MyMethod(aMyArray);
 }

public void MyMethod(string[] aArray) {
   ...
}

public void MyMethod(int[] myArray)
{
  ... // do something with myArray
}

namespace ModelDialogExceptions
{
    public partial class ModelDialog : Form
    {
        public ModelDialog()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                // this is just for test, of course
                throw new System.IO.FileNotFoundException("");

                // when all is fine...
                DialogResult = DialogResult.OK;
            }
            catch (Exception)
            {
                // when it goes wrong...
                DialogResult = DialogResult.Abort;
            }
        }

        internal static bool GetMyFile()
        {
            ModelDialog md = new ModelDialog();
            switch (md.ShowDialog())
            {
                case DialogResult.OK:
                    return true;
                case DialogResult.Abort:
                    throw new ApplicationException("Operation aborted, an exception may have been thrown.");
                case DialogResult.Cancel:
                    throw new ApplicationException("Cancelled by user.");
                default:
                    throw new ApplicationException("Unknown error.");
            }
        }
    }
}

namespace ModelDialogExceptions
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                if (ModelDialog.GetMyFile())
                {
                    MessageBox.Show("All ok!");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}