C#

class Main
{
   public Main()
   {
      X x = new X();
      x.function1("myText"); -> false
      X2 x2 = new X2();
      x2.function1("myText"); -> true
   }
}

interface InterfaceX
{
    int number { get; };
    bool function1(String txt);
}

class X :  Z, InterfaceX
{
    public int number
    {
       get { return 5;}
    }
   public X(){}
}
class X2 : Z, InterfaceX
{
    public int number
    {
       get { return 2;}
    }
    public X2() {}
}

class Z : Y, 
{
   public bool function1(String txt)
   {
      return base.function2(this.getParent(), txt);
   }
}

class Y
{
   public bool function2(InterfaceX x, String txt)
   {
      if(x.number < 3)
         return true;
      else
         return false;
   }
}

class Z : Y
{
    public bool function1(String txt)
    {
        if(this is InterfaceX)
            return base.function2((InterfaceX)this, txt);
        else
            return false; // maybe throw exception?
    }
}

Page.ClientScript.RegisterClientScriptBlock

J4amieC wrote:

Consider using a StringBuilder rather than lots of string concatenation using +=

using System;

class Foo
{
	public static int Main(string[] args)
	{
		string s = "Hello, " + "world!";
		Console.WriteLine(s);
		
		return 0;
	}
}

String javaScript = String.Format(@"
<javascript> etc. </javascript>
<and other="" stuff="" here=""></and>
{0} <- a variable
{1} <- another variable", variable1, variable2);

protected void Page_PreRender(object sender, EventArgs e)
{
	/* Call your method that registers JavaScript from here.  This event is called even if
	 * you only have a Call Back rather than a Post Back
	 */
	 
	 RegisterClientScript();
}

// This method contains any dynamic JavaScript that I wish to register on the page
protected void RegisterClientScript()
{
	// Check first to see if the page has already had the Javascript code registered.
	if (!(Page.ClientScript.IsStartupScriptRegistered("myJS"))
	{
		// Use a string builder to, well, build the string.  This limits the number of immutable strings that are added to memory and must
		// be eventually garbage collected.
		StringBuilder js = new StringBuilder();
		
		// Build the JavaScript code.  Note that inside the string we are actually using single quotes - this is legal in JavaScript for strings. 
		// In this way you don't even have to mess with escape characters.  At least not as often - there may still be occasions where you will
		// need single quotes.
		js.AppendLine("TargetDate = 'friday';");
		js.AppendLine("BackColor = 'palegreen';");
		js.AppendLine("ForeColor = 'navy';");
		js.AppendLine("CountActive = true;");
		js.AppendLine("CountStepper = -1;");
		js.AppendLine("LeadingZero = true;");
		js.AppendLine("DisplayFormat = '%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.';");
		js.AppendLine("FinishMessage = 'It is finally FRIDAY!'");
		
		/* Call the register startup script method.  This will call the above script to execute when the page renders.  The first parameter is any instance of the
		  * System.Type class, but usually you want to pass the type of this Page or Control.  Next is the key, then the JavaScript string itself.  The last boolean value
		  * specifies whether or not script tags should be added to the JavaScript code.  You can add them yourself or just do as I did and have the RegisterClientScript method
		  * do this for you.  To me this way is cleaner.
		  */
		Page.ClientScript.RegisterStartupScript(this.GetType(), "myJS", js.ToString(), true);
	}
}

<script language="JavaScript">
    TargetDate = '12/12/2008 12:00:00 AM';
    BackColor = 'palegreen';
    ForeColor = 'navy';
    CountActive = true;
    CountStepper = -1;
    LeadingZero = true;
    DisplayFormat = '%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.';
    FinishMessage = 'It is finally FRIDAY!';
</script>
<script language="JavaScript" src="countdown.js"></script>

<script language="JavaScript">
    TargetDate = '12/12/2008 12:00:00 AM';
    BackColor = 'palegreen';
    ForeColor = 'navy';
    CountActive = true;
    CountStepper = -1;
    LeadingZero = true;
    DisplayFormat = '%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.';
    FinishMessage = 'It is finally FRIDAY!';
</script>

public delegate void ThreadStart()

private void button1_Click(object sender, eventArgs e)
{
    thrd_1 = new Thread(new ThreadStart(button1_Clickthread));
    thrd_1.start()
}


private void button1_Clickthread()
{
    things to do 1
    things to do 2
}

Mark Salsbery
Microsoft MVP - Visual C++