The Joy Of Programming

I have often seen requirements to have a combobox with multiple selection enabled. We know thatWPF ListBox control is having two special properties, which enables the multiple selection but the combobox doesnt have those public IList SelectedItems { get; } public SelectionMode SelectionMode { get; set; } There are many ways we can make a multiselect combo box 1)Create a custom control from the scratch and have a Listbox in the dropdown 2)Extend the combobox and add the above properties to it 3)Edit the Combobox control template to add necessary controls and binding. I am going to describe the 3rd idea from the above list, which is a total Expression Blend work, so no need of VS2008 to make a multiselect combobox from a simple combobox. Place a combobox in to the editing area and right click on the control to create an copy of the Control template. Now you can see the Control's tree on the left side of Expression Blend The ItemPresenter inside the scrollviewer is actually the...

"When one stares at the center for about 20 seconds or so, one first sees a gap running around the circle of lilac disks, then a green disk running around the circle of lilac disks, then a green disk running around on the grey background, the lilac disks having disappeared or having been erased by the green disk. This is due to an interesting effect in which the colors of the lilac disks are inverted in the optical illusion to a green color" This optical illusion is called Lilac chaser  . Just thought of creating a silverlight version of this illusion for fun. I have used a radial panel( from my old blog ) to layout the ellipses radially, and implemented a a timer to change the visibility in a sequential way. This kind of effects can be a good candidate for Splash sreen for silverlight applications :) Full source can be found here