Creating a multiline RadComboBox with multiline text editing

HOW-TO 
Create a multiline RadComboBox with multiline text editing

SOLUTION
It is easy to set multiline Text for each item in RadComboBox:

1. Locate the Text property of the item 
2. Click on the DropDown arrow of the Text property - this will show a small text editor box where you can type your multiline text. Use Enter to create a new line and Ctrl+Enter to apply the entered value to the property:
    
   
    
3. Allowing multiline text editing in the ComboBox is a bit tricky as you would need to do it in codebehind. Here is the code you need to use after InitializeComponent() is called on your form:
   
   RadTextBoxItem textBoxItem =
       this.RadComboBox1.ComboBoxElement.TextBoxElement.Children[0]
       as RadTextBoxItem;
   if (textBoxItem != null)
   { 
       textBoxItem.Multiline = true; 
       textBoxItem.HostedControl.Height = 50;
   }

The result is as shown in the fig. bellow: