i understand that in csharp "string" and "object" are reference type...
For e.g. in this case
myString is passed to a method and it changes the value of the string..
if string is a reference type, isnt it passed to the method by

I'm using Visual studio 2003. I was wondering if there was  a way to freeze
the first 2 rows of a datagrid. So if the user scrolls to the last datarow is
there a way for the user to still be able to view the first 2 rows?
Something like Excel's freeze rows..

I need to display PDF documents in my vs2005 winform app.  What are my
choices?  I can't seem to find a 3rd party PDF viewer control?  Is Adobe
ActiveX control my only choice?
Thanks.

I've got a DLL from a 3rd party vendor and they wrote the DLL in C++ so I
can't just easily add a reference to it.  How do I add that dll, to my C#
application?
Any idea, examples?

I want to delete rows from my database. So I download them to a
dataset, and then discover the following.
This does not work:
dataset["tablename"].Rows.Clear();

I need some opionions on an issue here...
Suppose I want to keep a collection of objects, each need to be
uniquely identified by a number. This number has no meaning as long as
it's unique, so it should be automatically generated for each new

I was reading about the provider model and found that providers have a
definition, the contract, that all provider implementations must have.
Is this an example of polymorphic behavior because there is a
definition (either an abstract class or an interface) and each

I have a question concerning nested locks.  I just noticed that I have
an object declared in my parent class that I use as the lock.  But what
I noticed is that in one of the childs methods, I lock that object,
then while still in the critical section I call one of my inherited

Using VS 2005. I got an 'IpForm' class and an 'IpFormCollection' class,
containing IpForm objects. To iterate through IpFrom objects with
foreach, the class is implemented as such:
    public class IpFormCollection : IEnumerable<IpForm>

I load the contents of an excel sheet into a dataset via the excel
object library (couldn't get the #$%#$^ oledb/ado route to work -
#^$%&^%$ connection strings... grrr.... )
Anyway, after I get the sheet's contents into my dataset, I'd love to

I have a text and I need to find a Word that are not enclosed in
paranthesis. Can it be done with a regex? Is someone could help me?
I am not familar with regex...
Example looking for WORD:

what's the trick in showing/hiding columns in ListView's Details view mode?
I can change a columns width to 0 and it effectively makes it disappear but
then you can actually resize the column to bring it back into view.
Is there any way to disable resizing for just that one ...

Does anyone know how to cancel the selection of a block that has been copied
programmatically using C# and Excel Interop.
This is my current code:
                           rng=XLApp.get_Range("OrigRows",m); //selects the

I have a text and I need to find a Word that are not enclosed in
paranthesis. Can it be done with a regex? Is someone could help me?
I am not familar with regex...
Example looking for WORD:

IF I am making a custom user control which draws stuff that might exceed its
boundaries, can I get the user control to handle the scrolling for me? The
AutoScroll property doesn't seem to be doing it. Do I have to set some
special Size so it knows it's supposed to scroll?