Worked on CreateProjectDialog

RainmeterStudio.Core/Utils/LinqExtension.cs

@@ -21,5 +21,19 @@ namespace RainmeterStudio.Core.Utils
             foreach (var obj in container)
                 action(obj);
         }
+
+        /// <summary>
+        /// Appends an item at the end of the container
+        /// </summary>
+        /// <typeparam name="T">Enumerable type</typeparam>
+        /// <param name="container">Container</param>
+        /// <param name="item">Item to append</param>
+        public static IEnumerable<T> Append<T> (this IEnumerable<T> container, T item)
+        {
+            foreach (var i in container)
+                yield return i;
+
+            yield return item;
+        }
     }
 }

RainmeterStudio.Core/Utils/PathHelper.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace RainmeterStudio.Core.Utils
+{
+    public static class PathHelper
+    {
+        /// <summary>
+        /// Validates a path
+        /// </summary>
+        /// <param name="path">The path</param>
+        /// <returns>True if the path is valid</returns>
+        public static bool IsPathValid(string path)
+        {
+            // Check for invalid characters
+            if (Path.GetInvalidPathChars().Intersect(path).Any())
+                return false;
+
+            return true;
+        }
+    }
+}