Why is my inherited window forms control deleted
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Hello! I have a very specific question and that is about how to inherit a visual control for example the control System.Windows.Forms.TextBox without causing the environment to delete the control when there are some compile errors. It's the same problem with any visual control that you inherit. The control is deleted as soon as you use the View Designer when there is compile error. It's very easy to reproduce my problem. You can do it in this way. 1. Create a class called ExtTextBox like this. In my example here I have removed the namespace. But if you include namespace make sure you have access to it. public class ExtTextBox : System.Windows.Forms.TextBox { public ExtTextBox() {} } As you can see this class ExtTextBox inherit from the ordinary components System.Windows.Forms.TextBox in the .NET framework 2. Create a windows form with any name. The default is Form1 3. Use the View Designer and drag the control TextBox into the window form. My control was called textBox1 4. Because I want the control textBox1 to be an instance of ExtTextBox I have to edit the InitializeComponent() I don't have any other idea. Here is an extract from my windows form called Form1. Only the interesting rows is written. Two rows is important here. First saying that control textBox1 is of type ExtTextBox. Second edit the InitializeComponent and say that textBox1 is an instance of ExtTextBox. public class Form1 : Form { private ExtTextBox textBox1; ... ... ... Private void InitializeComponent() { this.textBox1= new ExtTextBox(); ... ... ... } } 5 Compile. Hopefully you don't get any compile errors. When you run the application only the textBox is being displayed. The problem might start even here. If you get any compile error and you use the View Designer the control named textBox1 is being deleted. 6 If you don't get any compile error make a change so you get a compile error and then use the View Designer the control named textBox1 is being deleted. 7 Now to my question. I can't use controls that being deleted automatically when I get compile error as soon as I use the View Designer. 8. If I want to use inheritance on visual control how do I do. I just can't have it as it is now. 9 I just can't use inheritance in the way I do now. 10. I hope that you have a good suggestion how I should use inheritance on visual control to avoid this kind of problems. Additional inform