I've been tasked to write a windows app that allows people to enter
transactions.  For each transaction, there can be an unknown number of items,
and as a person enters an item, the program asks if there are more items.  If
yes, a new set of input boxes are created dynamically.  ...

I'm using the EL 2.0 library. I have a datalayer where I am debating doing 2
things... I'm concerned that because I am using a IDataReader, my connection
to the database is never getting closed and I have to rely on garbage
collection to close the connections.

First, all over my code I have something like this:
if(dumbEvent != null)
  dumbEvent(blah);
What's dumb about that is that the compiler or JIT engine should be

How can i add a collection to another collection ?
For example :
---------------------------------------------
StringCollection strColl= new StringCollection(); //string series

Could you please tell me the difference between DataSet and DataTable?
Thank u!

Does anyone have a simple example on how to use the Console.Key() function?
I’m just trying to read in 5 numbers.
Something like this.
String Key ConsoleKeyInfo();

I can’t find the line numbering on/off in the option box. Am I missing
something? Can any one help me.
I’m using visual studio C# 2005 express edition
thank You

I want to display +/- sign with the percentage value in the data grid.
I have provide "0.000%" as the format for the datagridcolumnstyle. Can
anyone let me know how can I display the positive (+) sign with the
value?

I'm looking for an effective way to open and close TCP ports.   Can I do
this through Tcpclient?   And I know this is a potential security risk, so
what kind of permission must the person running the application possess to
handle it without errors?

I have a need to reverse a date to show as a "date code".  For example
today, 090507 would be coded as 905070 (reversing the parts of the date.
This is what i have but there has to be a better way.
DateTime d = DateTime.Now;

I have a form with a webbrowser control set to fill the form.
I want to capture when the form is clicked.
As the browser control is filling the form the user would click on
the browser conttrol, but it does not have a click event.

is there any shortcut available that i can use, without typing all the
time Console.Writeline() all the time in C#?
Thanks

This is actually (probably) a C# or .NET issue. I'm working on an VS 2005
AddIn and at one point I'm caching all "EnvDTE80.ErrorItem" objects that
result from compiling one or more projects in an arbitrary solution (which
my own code carries out). These objects simply store each ...

I get this error:
" Error    1    'calcolo_percentuale.Program.CalcolaPercentuale(double,
double, out double, out double)': not all code paths return a value    C:
\Documents and Settings\Robert\Desktop\prova VS8\calcolo percentuale

I'm trying to implement a voice recording function. Basically it's
supposed to record the WAV and write it out to the file, at which
point LAME will kick in and convert it to MP3.
The only problem is that I'm having issues writing it out. I'm using