C#

• code that cannot be verified as type-safe by the .NET Common Language Runtime (CLR).
• is not Common Language Specification (CLS)-compliant, meaning that other .NET languages like VB.NET, J#, and so on are not required to implement nor are they guaranteed to consume such code, if it were declared as public and made available to other .NET dlls & executables.
• requires a full trust security scenario in order to run, for instance, it must be installed/run from the target machine; if you try to use pointers in code run in a partial-trust scenario (e.g. a C# applet over the internet), the .NET CLR will throw a SecurityException because pointers require full access to the machine's memory, thus are potentially dangerous to the end user.
For a function, class, or code block to be unsafe, just use the unsafe keyword:



unsafe class MyClass
{
}

unsafe void MyFunction()
{
}

void MyFunctionWithUnsafeBlock
{

unsafe
{
}

}



Despite all these cautions, you're free to use pointers as much as you like if your application is a standalone app or dll, indeed, the .NET framework uses pointers internally quite often for performance gains and interop scenarios.



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Hashtable rangeMap = new Hashtable();
rangeMap[YearBuiltTextBox] = new int[] {1800, 2200};
rangeMap[YearRenovateTextBox] = new int[] {2400, 2800};

this.YearRenovateTextBox.Enter += new EventHandler(Parse_TextBox);
this.YearBuiltTextBox.Enter += new EventHandler(Parse_TextBox);

public void Parse_TextBox(System.Object sender, System.EventArgs e)
{
   int[] range = (int[])rangeMap[sender];
    object parseValue = DataFormatter.ParseInteger(this.YearBuiltTextBox.Text,range[0], range[1]); 
}

<br />
textbox1.enter += new EventHandler(myEventHandler);<br />
textbox2.enter += new EventHandler(myEventHandler);<br />
public void myEventHandler(object sender,EventArg e)<br />
{<br />
/*  you could skip this and just use it like<br />
    ((TextBox)sender).Name<br />
*/<br />
  TextBox tmpBox = (TextBox)sender;<br />
  if(tmpBox.Name == "textbox1")<br />
  {<br />
    //2400, 2800<br />
  }<br />
  else<br />
  {<br />
     //1800, 2200 <br />
  }<br />
}<br />

this.yearBuiltTextBox.Enter += new EventHandler(Parse_TextBox);
this.yearRenovateTextBox.Enter += new EventHandler(Parse_TextBox);

void ParseTextBox(object sender, EventArgs e)
{
 TextBox tbSender = (TextBox)sender;
 if(sender.Enabled == false)
 {
  return;
 }


 int min, max;
 if(tbSender == this.yearBuiltTextBox)
 {
  min = 1800;
  max = 2200;
 }
 else
 {
  min = 2400;
  max = 2800;
 }

 object parseValue = DataFormatter.ParseInteger(this.yearBuiltTextBox.Text, min, max);
}