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This tutorial will show you how to develop a voting/polling system in a Windows Form with the use of XML and LINQ, using C#.
Polling systems can be extremely useful for capturing opinions or current trends. In this tutorial, we will look at how we can create a Windows Form to build a voting system where users can vote who is their favorite Presidentail Candidate, and then see the current results. We will be using an XML file to store the data. We will start by creating the structure of the XML file:

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In most of the cases specially for reporting purpose we need to merge GridView cells or columns for client preferred output. In this example i will show you how one can merge GridView cells or columns in asp.net C#. My special focus is on to merge cells when both contains same or equal data.