DevExpress.Build

 using System.Collections.Generic;
 using Microsoft.Build.AppxPackage;
 using Microsoft.Build.Framework;

 namespace DevExpress.Build
 {
     public class DXGeneratePriConfigurationFiles : GeneratePriConfigurationFiles
     {
         public override bool Execute()
         {
             List<ITaskItem> list = new List<ITaskItem>();
             ITaskItem[] layoutFiles = base.LayoutFiles;
             for (int i = ; i < layoutFiles.Length; i++)
             {
                 ITaskItem taskItem = layoutFiles[i];
                 if (!taskItem.ItemSpec.EndsWith("xaml"))
                 {
                     list.Add(taskItem);
                 }
             }
             //base.set_LayoutFiles(list.ToArray());
    base.LayoutFiles=list.ToArray();
             return base.Execute();
         }
     }
 }