Hi Ukris,
Thanks for your interest in Syncfusion product.
We have created a sample application to acheive the said behavior. Please download the sample from the attached file.
We are in the process of making "Integrated Outlook like demo for Silverlight" sample, and will update you further when the sample creation process is over. You may also check our "Product showcase sample" periodically to know about the sample information.
Please let us know if you need further information.
Regards,
Kannan.S
97058_Sort_Grouping_cb553d96.zip