support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Data/Enum/StepStatus.cs

@@ -0,0 +1,23 @@
+namespace HandyControl.Data
+{
+    /// <summary>
+    ///     步骤状态
+    /// </summary>
+    public enum StepStatus
+    {
+        /// <summary>
+        ///     完成
+        /// </summary>
+        Complete,
+
+        /// <summary>
+        ///     进行中
+        /// </summary>
+        UnderWay,
+
+        /// <summary>
+        ///     等待中
+        /// </summary>
+        Waiting
+    }
+}