Pushing missing changes

MediaBrowser.Model/Extensions/ModelExtensions.cs

@@ -0,0 +1,20 @@
+
+namespace MediaBrowser.Model.Extensions
+{
+    /// <summary>
+    /// Class ModelExtensions
+    /// </summary>
+    static class ModelExtensions
+    {
+        /// <summary>
+        /// Values the or default.
+        /// </summary>
+        /// <param name="str">The STR.</param>
+        /// <param name="def">The def.</param>
+        /// <returns>System.String.</returns>
+        public static string ValueOrDefault(this string str, string def = "")
+        {
+            return string.IsNullOrEmpty(str) ? def : str;
+        }
+    }
+}