CSharp cleanup and fixes:

- Add EditorBrowsable(EditorBrowsableState.Never) to
  hidde internal public methods from Intellisense,
  see ICE-7448.
- Remove Base64 and replace it with .NET System.Convert
  see ICE-7477
- Remove SysLogger as that was only used by Mono
- Simplify ThreadPriority setting
- Remove using statements that are not required
- Normalize string, char, object spell, preferred over
  String, Char, Object
- Shorthen qualifier names avoiding redundant scopes.

1 files changed, 2 insertions, 4 deletions

diff --git a/csharp/src/Ice/EndpointFactoryManager.cs b/csharp/src/Ice/EndpointFactoryManager.cs
index 5cf22c23ceb..814b3686372 100644
--- a/csharp/src/Ice/EndpointFactoryManager.cs
+++ b/csharp/src/Ice/EndpointFactoryManager.cs
@@ -9,10 +9,8 @@
 
 namespace IceInternal
 {
-
     using System.Collections.Generic;
     using System.Diagnostics;
-    using System.Text.RegularExpressions;
 
     public sealed class EndpointFactoryManager
     {
@@ -28,7 +26,7 @@ namespace IceInternal
             {
                 for(int i = 0; i < _factories.Count; i++)
                 {
-                    EndpointFactory f = (EndpointFactory)_factories[i];
+                    EndpointFactory f = _factories[i];
                     if(f.type() == factory.type())
                     {
                         Debug.Assert(false);
@@ -44,7 +42,7 @@ namespace IceInternal
             {
                 for(int i = 0; i < _factories.Count; i++)
                 {
-                    EndpointFactory f = (EndpointFactory)_factories[i];
+                    EndpointFactory f = _factories[i];
                     if(f.type() == type)
                     {
                         return f;