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copied!<p>Load your data asynchronous. Present something nice on the GUI for the user while loading. The following code can help you with this:</p> <pre><code>BackgroundWorker bgWorker = new BackgroundWorker() { WorkerReportsProgress=true}; bgWorker.DoWork += (s, e) => { // Load here your file/s // Use bgWorker.ReportProgress(); to report the current progress }; bgWorker.ProgressChanged+=(s,e)=>{ // Here you will be informed about progress and here it is save to change/show progress. // You can access from here savely a ProgressBars or another control. }; bgWorker.RunWorkerCompleted += (s, e) => { // Here you will be informed if the job is done. // Use this event to unlock your gui }; bgWorker.RunWorkerAsync(); </code></pre> <p>The app is not faster but it seems to be much faster because the GUI is immediately visible and responsive. Maybe you also can show the user a part of the loaded data while loading the rest. Use the <code>ProgressChanged</code>-event for doing this.</p> <p><strong>Update</strong></p> <p>I'm not sure if I understand your problem right. If your problem is not the time data needs to be loaded, then something is odd in your application. WPF is IMO very fast. Control-creation does not takes a lot of time. I visualize much bigger lists as you mention in some milliseconds. </p> <p>Try to look if you have something in your UI that hinders the DataGrid to virtualize the Items. Maybe you have a proplem there. To analyse WPF apps, I can recommend you the <a href="http://msdn.microsoft.com/en-us/library/aa969767.aspx">WPF Profiling Tools</a>.</p>

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