Update to 3.5.2 and .net core 2.1

Emby.Naming/Extensions/StringExtensions.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Text;
+
+namespace Emby.Naming.Extensions
+{
+    public static class StringExtensions
+    {
+        public static string Replace(this string str, string oldValue, string newValue, StringComparison comparison)
+        {
+            var sb = new StringBuilder();
+
+            var previousIndex = 0;
+            var index = str.IndexOf(oldValue, comparison);
+
+            while (index != -1)
+            {
+                sb.Append(str.Substring(previousIndex, index - previousIndex));
+                sb.Append(newValue);
+                index += oldValue.Length;
+
+                previousIndex = index;
+                index = str.IndexOf(oldValue, index, comparison);
+            }
+
+            sb.Append(str.Substring(previousIndex));
+
+            return sb.ToString();
+        }
+    }
+}