Thanks for reply. Yes, right. I forgot to mention that I set [Browsable(true)] for the property. Is there anything else? Stefan

Thank you for your answer. I design the Collection in the Form-Designer, so Debugging is not possible. The problem is that I cannot see what the Designer wants to code because the designer tries to put code and cannot because the code would be wrong, so I can't see what the designer want to write. Thanks Stefan

STW wrote: This error occurs only if I edit a row and update, NOT when I add new Rows and update then. Because it's used only in the DataAdapter.UpdateCommand and, thus, must be added to the DataAdapter.UpdateCommand's Parameters property. The data adapter designer will do this for you if you opt for it. The exception would not be thrown if the Parameters property contained the parameter correctly - i.e., it's named "@Original_adid" and is declared as the correct type. Microsoft MVP, Visual C# My Articles

Global variables are generally a sign of poorly thought out design. However there are cases when you want to make something available to classes across your application (like values from the application's config class). I would suggest a couple of approaches: 1. Is to make the variable available through a static property of an appropriate class. 2. Is to make a class (a singleton) that exposes these values through static properties. For instance a Config class that retrieves the information from a config file and exposes them to the rest of the application. "You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar Coming soon: The Second EuroCPian Event

1. I think it's impossible to have one table into two datasets 2. Try to use one dataset or copy table with data Hi, AW

Inherit your control from ListControl. It contains the base implementation for binding a control to a list. If you just want to bind your control to a single value, take a look at the Control.DataBindings property.

This does really make sense! Yes that's what I searched. The problem was always that a casted object "looses" the classes methods...So now I see... Thank you very much! Stefan

Thanks a lot for this idea! Stefan

Thank you! You answered exactly what I wanted. Process Start Cmd.exe : Did not see this solution. File.Copy, Directory.Create : simple, I just did not find it in the help doc. Thank you! Stefan

you can override the Onpaint method and do whatever you like. Requires lot of work, after whatever you do call the base.Onpaint with the same arguments;

you can set the path yes , check this msdn article about it : msdn article switch(twinsOnWay) { case ("twins on the way"):     MessageBox.Show("for mr and mrs dynamic","twins on the way"); break; }

STW wrote: In a class I open this file with the following FilePath:"..\\..\\XmlFile.xml". Instead of using that way, why don't you the keep file in the bin\debug. The better way is select the file via OpenFileDialog. Use the FileInfo class so that you can check that file exist or not. FileInfo fileInfo = new FileInfo(fileName); if(fileInfo.Exists) { .. } STW wrote: But what is if I want to install my project? Then the Xml File will be in the application folder but in my class the folder stays "..\\..\\XmlFile.xml" so the file won't be found. If you have already got the Deployment project in your solution. Then just add the XML file to that project and make sure that the 'Folder' property of that file is set to "Application Folder". (Properties window)_ Never take a problem to your boss unless you have a solution._ This signature was created by "Code Project Quoter".

Thank you all for your answers! Your answers are focused on Application Deployment but I want to use Crystal Reports in .NET while developing the project (otherwise I couldn't set the enviroment for the Crystal Report). I just wanted to know how I can change the registration key for the project I'm on now. Is this not possible? Is it really need to make a deploying project? The situation now is that when I "Add New Item", Crystal Report, a message comes up "Invalid Key". Then I can't do anything in the report. The Crystal Report worked before I've entered the registration key, so I think I misstyped it and want now to recheck and reenter this code. Please answer this. Stefan