Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Security/AntiXss/CodeCharts/CodeChartHelper.cs

@@ -0,0 +1,28 @@
+//------------------------------------------------------------------------------
+// <copyright file="CodeChartHelper.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Security.AntiXss.CodeCharts {
+    using System;
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.Linq;
+
+    internal static class CodeChartHelper {
+        internal static IEnumerable<int> GetRange(int min, int max, Func<int, bool> exclusionFilter) {
+            Debug.Assert(min <= max);
+
+            var range = Enumerable.Range(min, (max - min + 1));
+            if (exclusionFilter != null) {
+                range = range.Where(i => !exclusionFilter(i));
+            }
+            return range;
+        }
+
+        internal static IEnumerable<int> GetRange(int min, int max) {
+            return GetRange(min, max, null);
+        }
+    }
+}