Changed CharCollection input to not special case :

src/Umbraco.Configuration/Models/RequestHandlerSettings.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Extensions.Configuration;
 using Umbraco.Core;
@@ -8,6 +9,35 @@ namespace Umbraco.Configuration.Models
 {
     internal class RequestHandlerSettings : IRequestHandlerSettings
     {
+        private const string Prefix = Constants.Configuration.ConfigPrefix + "RequestHandler:";
+        private static readonly CharItem[] DefaultCharCollection =
+        {
+            new CharItem { Char = " ", Replacement = "-" },
+            new CharItem { Char = "\"", Replacement = "" },
+            new CharItem { Char = "'", Replacement = "" },
+            new CharItem { Char = "%", Replacement = "" },
+            new CharItem { Char = ".", Replacement = "" },
+            new CharItem { Char = ";", Replacement = "" },
+            new CharItem { Char = "/", Replacement = "" },
+            new CharItem { Char = "\\", Replacement = "" },
+            new CharItem { Char = ":", Replacement = "" },
+            new CharItem { Char = "#", Replacement = "" },
+            new CharItem { Char = "+", Replacement = "plus" },
+            new CharItem { Char = "*", Replacement = "star" },
+            new CharItem { Char = "&", Replacement = "" },
+            new CharItem { Char = "?", Replacement = "" },
+            new CharItem { Char = "æ", Replacement = "ae" },
+            new CharItem { Char = "ä", Replacement = "ae" },
+            new CharItem { Char = "ø", Replacement = "oe" },
+            new CharItem { Char = "ö", Replacement = "oe" },
+            new CharItem { Char = "å", Replacement = "aa" },
+            new CharItem { Char = "ü", Replacement = "ue" },
+            new CharItem { Char = "ß", Replacement = "ss" },
+            new CharItem { Char = "|", Replacement = "-" },
+            new CharItem { Char = "<", Replacement = "" },
+            new CharItem { Char = ">", Replacement = "" }
+        };
+
         private readonly IConfiguration _configuration;
 
         public RequestHandlerSettings(IConfiguration configuration)
@@ -16,29 +46,39 @@ namespace Umbraco.Configuration.Models
         }
 
         public bool AddTrailingSlash =>
-            _configuration.GetValue<bool?>("Umbraco:CMS:RequestHandler:AddTrailingSlash") ?? true;
+            _configuration.GetValue(Prefix+"AddTrailingSlash", true);
 
         public bool ConvertUrlsToAscii => _configuration
-            .GetValue<string>("Umbraco:CMS:RequestHandler:ConvertUrlsToAscii").InvariantEquals("true");
+            .GetValue<string>(Prefix+"ConvertUrlsToAscii").InvariantEquals("true");
 
         public bool TryConvertUrlsToAscii => _configuration
-            .GetValue<string>("Umbraco:CMS:RequestHandler:ConvertUrlsToAscii").InvariantEquals("try");
+            .GetValue<string>(Prefix+"ConvertUrlsToAscii").InvariantEquals("try");
 
 
         //We need to special handle ":", as this character is special in keys
-        public IEnumerable<IChar> CharCollection => _configuration
-            .GetSection("Umbraco:CMS:RequestHandler:CharCollection")
-            .GetChildren()
-            .Select(kvp => new CharItem
+        public IEnumerable<IChar> CharCollection
+        {
+            get
             {
-                Char = kvp.Key,
-                Replacement = kvp.Value
-            }).Union(new[]
-            {
-                new CharItem { Char = ":", Replacement = string.Empty }
-            });
+                var collection = _configuration.GetSection(Prefix + "CharCollection").GetChildren()
+                    .Select(x => new CharItem()
+                    {
+                        Char = x.GetValue<string>("Char"),
+                        Replacement = x.GetValue<string>("Replacement"),UseLegacyEncoding
+                    }).ToArray();
 
-        private class CharItem : IChar
+                if (collection.Any() || _configuration.GetSection("Prefix").GetChildren().Any(x =>
+                    x.Key.Equals("CharCollection", StringComparison.OrdinalIgnoreCase)))
+                {
+                    return collection;
+                }
+
+                return DefaultCharCollection;
+            }
+        }
+
+
+        public class CharItem : IChar
         {
             public string Char { get; set; }
             public string Replacement { get; set; }

src/Umbraco.Core/Constants-Configuration.cs

@@ -0,0 +1,16 @@
+namespace Umbraco.Core
+{
+    public static partial class Constants
+    {
+        public static class Configuration
+        {
+            /// <summary>
+            /// Case insensitive prefix for all configurations
+            /// </summary>
+            /// <remarks>
+            /// ":" is used as marker for nested objects in json. E.g. "Umbraco:CMS:" = {"Umbraco":{"CMS":{....}}
+            /// </remarks>
+            public const string ConfigPrefix = "Umbraco:CMS:";
+        }
+    }
+}

src/Umbraco.Core/Constants-System.cs

@@ -1,4 +1,4 @@
-namespace Umbraco.Core
+ namespace Umbraco.Core
 {
     public static partial class Constants
     {

src/Umbraco.Web.BackOffice/AspNetCore/UmbracoBackOfficeServiceCollectionExtensions.cs

@@ -8,6 +8,7 @@ using Umbraco.Configuration;
 using Umbraco.Core;
 using Umbraco.Core.Cache;
 using Umbraco.Core.Configuration;
+using Umbraco.Core.Configuration.UmbracoSettings;
 using Umbraco.Core.IO;
 using Umbraco.Core.Logging;
 using Umbraco.Core.Logging.Serilog;
@@ -23,6 +24,10 @@ namespace Umbraco.Web.BackOffice.AspNetCore
             var configsFactory = new AspNetCoreConfigsFactory(configuration);
 
             var configs = configsFactory.Create();
+
+            var x = configs.GetConfig<IRequestHandlerSettings>();
+
+            var y = x.CharCollection;
             services.AddSingleton(configs);
 
             return services;

src/Umbraco.Web.UI.NetCore/Umbraco.Web.UI.NetCore.csproj

@@ -14,4 +14,9 @@
       <Folder Include="wwwroot\Media" />
     </ItemGroup>
 
+    <ItemGroup>
+      <_ContentIncludedByDefault Remove="wwwroot\~\App_Data\TEMP\TypesCache\umbraco-types.DESKTOP-2016.hash" />
+      <_ContentIncludedByDefault Remove="wwwroot\~\App_Data\TEMP\TypesCache\umbraco-types.DESKTOP-2016.list" />
+    </ItemGroup>
+
 </Project>

src/Umbraco.Web.UI.NetCore/appsettings.json

@@ -71,32 +71,18 @@
       },
       "RequestHandler": {
         "AddTrailingSlash": true,
-        "CharCollection": {
-          " ": "-",
-          "\"": "",
-          "'": "",
-          "%": "",
-          ".": "",
-          ";": "",
-          "/": "",
-          "\\": "",
-          ":": "",
-          "#": "",
-          "+": "plus",
-          "*": "star",
-          "&": "",
-          "?": "",
-          "æ": "ae",
-          "ø": "oe",
-          "å": "aa",
-          "ä": "ae",
-          "ö": "oe",
-          "ü": "ue",
-          "ß": "ss",
-          "|": "-",
-          "<": "",
-          ">": ""
-        }
+        "CharCollection": [
+            {"Char": " ", "Replacement": "-"},
+            {"Char": "\"", "Replacement": ""},
+            {"Char": "'", "Replacement": ""},
+            {"Char": "%", "Replacement": ""},
+            {"Char": ".", "Replacement": ""},
+            {"Char": ";", "Replacement": ""},
+            {"Char": "/", "Replacement": ""},
+            {"Char": "\\", "Replacement": ""},
+            {"Char": ":", "Replacement": ""},
+
+        ]
       }
     }
   }

src/Umbraco.Web/Runtime/WebInitialComposer.cs

@@ -43,7 +43,6 @@ using Umbraco.Web.SignalR;
 using Umbraco.Web.Templates;
 using Umbraco.Web.Trees;
 using Umbraco.Web.WebApi;
-using Current = Umbraco.Web.Composing.Current;
 using Umbraco.Web.PropertyEditors;
 using Umbraco.Examine;
 using Umbraco.Core.Models;