Can anybody tell me what the C# equivalent to VB's
Err.Clear()
is? As far as I can see, the Err object only exists in VB. But how do you
clear the error collection in C# then?

I am trying to compile a code in command line and I get error messages
stating that I am missing assembly references. One of the assembly it
is complaining about is PresrantionFramework.dll which has Application
namespace. By the way, I am using VS2008 attempting to compile a WPF

How do I test for and handle a return of null in the following code?
               try
               {
                   OleDbConnection connection = new

I am trying to test if my object is a TextBox and I tried:
if (messageOut is TextBox)
But I get an error message:
The type or namespace name 'TextBox' could not be found (are you missing a

Could someone tell me how to compile a project to IL code? Let me
explain the reason. I have a program which will read a resource file
and creates some output. In this scenario, the program doesn't change,
but every month, I need to do a new release and and only thing it

When I try to compile a C# application using the command line code I
am getting the following error;
App.xaml.cs(line,column): error cs0246: The type or namespace name
'Application' could not be found

I have a project where I need to generate a file and then send it with a
supplied public key. I've done the file generation, now I'm trying to do the
encryption. It looks like I can use RSA, specifically
RSACryptoServiceProvider. The problem is that the public key is supposed to

I can imagine this question has been brought up before but I've spent all
morning trying to find what I need on google without success.
My application sits on Mysql or MS sql server engines and to date I've just
been using auto-incremental int64 fields to generate my RecID field.

I have created a new control and I need to pt it in the toolbox.
Actually, I have added a bitmap in ma solution and I code:
   [ToolboxBitmap(typeof(OKButton), "button_ok.bmp")]
   public class OKButton : Button

How do I add the ability to combine listview with treeview? I want to have a
list view but with some items in some columns to have the ability to act as
a tree instead of just a single item. (like, say, how outlook express does
it with its message headers)

Is Windows 2000 compatible with .net Framework 3.5 please ?
Jean-Luc !

I've JUST move to Vista, VS 2008, C# from XP, VS.net 2002, VB & C++ so I'm on
a steep learning curve.
I'm currently developing a C# Web App project in VS 2008. I need to query an
existing MS Access data base. I thought LINQ would be the way to go.

I wrote an C# application that uses drag and drop to copy the contents of
one ListViewItem to another.  I call DoDragDrop() in the ItemDrag event
handler, however, the ItemDrag event is being fired when an item in the
ListView is clicked to select it instead of being fired when ...

I have Text box controls and DataGridView control in WinForms form.
DataGridview contains custom ComboBox columns and standard TextBox columns.
Edit mode is EditOnEnter.
When focus is moved out of DataGridView, its current cell is displayed as

hey all,
what's the best way to search my DataColumn object to see if a column name
"contains" a certain string value?
thanks,