Mayor code cleanup

Add Argument*Exceptions now use proper nameof operators.

Added exception messages to quite a few Argument*Exceptions.

Fixed rethorwing to be proper syntax.

Added a ton of null checkes. (This is only a start, there are about 500 places that need proper null handling)

Added some TODOs to log certain exceptions.

Fix sln again.

Fixed all AssemblyInfo's and added proper copyright (where I could find them)

We live in *current year*.

Fixed the use of braces.

Fixed a ton of properties, and made a fair amount of functions static that should be and can be static.

Made more Methods that should be static static.

You can now use static to find bad functions!

Removed unused variable. And added one more proper XML comment.

4 files changed, 30 insertions, 61 deletions

diff --git a/Emby.Server.Implementations/Session/HttpSessionController.cs b/Emby.Server.Implementations/Session/HttpSessionController.cs
index ff9b3fefc..c61e2aff4 100644
--- a/Emby.Server.Implementations/Session/HttpSessionController.cs
+++ b/Emby.Server.Implementations/Session/HttpSessionController.cs
@@ -36,26 +36,11 @@ namespace Emby.Server.Implementations.Session
             _sessionManager = sessionManager;
         }
 
-        private string PostUrl
-        {
-            get
-            {
-                return string.Format("http://{0}{1}", Session.RemoteEndPoint, _postUrl);
-            }
-        }
+        private string PostUrl => string.Format("http://{0}{1}", Session.RemoteEndPoint, _postUrl);
 
-        public bool IsSessionActive
-        {
-            get
-            {
-                return (DateTime.UtcNow - Session.LastActivityDate).TotalMinutes <= 5;
-            }
-        }
+        public bool IsSessionActive => (DateTime.UtcNow - Session.LastActivityDate).TotalMinutes <= 5;
 
-        public bool SupportsMediaControl
-        {
-            get { return true; }
-        }
+        public bool SupportsMediaControl => true;
 
         private Task SendMessage(string name, string messageId, CancellationToken cancellationToken)
         {
@@ -164,7 +149,7 @@ namespace Emby.Server.Implementations.Session
             {
                 if (typeof(T) == typeof(string))
                 {
-                    var str = data as String;
+                    var str = data as string;
                     if (!string.IsNullOrEmpty(str))
                     {
                         options.RequestContent = str;
@@ -189,7 +174,7 @@ namespace Emby.Server.Implementations.Session
             }
         }
 
-        private string ToQueryString(Dictionary<string, string> nvc)
+        private static string ToQueryString(Dictionary<string, string> nvc)
         {
             var array = (from item in nvc
                          select string.Format("{0}={1}", WebUtility.UrlEncode(item.Key), WebUtility.UrlEncode(item.Value)))
diff --git a/Emby.Server.Implementations/Session/SessionManager.cs b/Emby.Server.Implementations/Session/SessionManager.cs
index 7321e9f86..4e444ac01 100644
--- a/Emby.Server.Implementations/Session/SessionManager.cs
+++ b/Emby.Server.Implementations/Session/SessionManager.cs
@@ -1,4 +1,4 @@
-using MediaBrowser.Common.Events;
+using MediaBrowser.Common.Events;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller;
@@ -148,10 +148,7 @@ namespace Emby.Server.Implementations.Session
         /// Gets all connections.
         /// </summary>
         /// <value>All connections.</value>
-        public IEnumerable<SessionInfo> Sessions
-        {
-            get { return _activeConnections.Values.OrderByDescending(c => c.LastActivityDate).ToList(); }
-        }
+        public IEnumerable<SessionInfo> Sessions => _activeConnections.Values.OrderByDescending(c => c.LastActivityDate).ToList();
 
         private void OnSessionStarted(SessionInfo info)
         {
@@ -218,15 +215,15 @@ namespace Emby.Server.Implementations.Session
 
             if (string.IsNullOrEmpty(appName))
             {
-                throw new ArgumentNullException("appName");
+                throw new ArgumentNullException(nameof(appName));
             }
             if (string.IsNullOrEmpty(appVersion))
             {
-                throw new ArgumentNullException("appVersion");
+                throw new ArgumentNullException(nameof(appVersion));
             }
             if (string.IsNullOrEmpty(deviceId))
             {
-                throw new ArgumentNullException("deviceId");
+                throw new ArgumentNullException(nameof(deviceId));
             }
 
             var activityDate = DateTime.UtcNow;
@@ -381,7 +378,7 @@ namespace Emby.Server.Implementations.Session
             }
         }
 
-        private string GetSessionKey(string appName, string deviceId)
+        private static string GetSessionKey(string appName, string deviceId)
         {
             return appName + deviceId;
         }
@@ -402,7 +399,7 @@ namespace Emby.Server.Implementations.Session
 
             if (string.IsNullOrEmpty(deviceId))
             {
-                throw new ArgumentNullException("deviceId");
+                throw new ArgumentNullException(nameof(deviceId));
             }
             var key = GetSessionKey(appName, deviceId);
 
@@ -582,7 +579,7 @@ namespace Emby.Server.Implementations.Session
 
             if (info == null)
             {
-                throw new ArgumentNullException("info");
+                throw new ArgumentNullException(nameof(info));
             }
 
             var session = GetSession(info.SessionId);
@@ -631,7 +628,7 @@ namespace Emby.Server.Implementations.Session
         /// <summary>
         /// Called when [playback start].
         /// </summary>
-        /// <param name="userId">The user identifier.</param>
+        /// <param name="user">The user object.</param>
         /// <param name="item">The item.</param>
         private void OnPlaybackStart(User user, BaseItem item)
         {
@@ -669,7 +666,7 @@ namespace Emby.Server.Implementations.Session
 
             if (info == null)
             {
-                throw new ArgumentNullException("info");
+                throw new ArgumentNullException(nameof(info));
             }
 
             var session = GetSession(info.SessionId);
@@ -742,7 +739,7 @@ namespace Emby.Server.Implementations.Session
 
         }
 
-        private bool UpdatePlaybackSettings(User user, PlaybackProgressInfo info, UserItemData data)
+        private static bool UpdatePlaybackSettings(User user, PlaybackProgressInfo info, UserItemData data)
         {
             var changed = false;
 
@@ -796,12 +793,12 @@ namespace Emby.Server.Implementations.Session
 
             if (info == null)
             {
-                throw new ArgumentNullException("info");
+                throw new ArgumentNullException(nameof(info));
             }
 
             if (info.PositionTicks.HasValue && info.PositionTicks.Value < 0)
             {
-                throw new ArgumentOutOfRangeException("positionTicks");
+                throw new ArgumentOutOfRangeException(nameof(info),"The PlaybackStopInfo's PositionTicks was negative.");
             }
 
             var session = GetSession(info.SessionId);
@@ -993,7 +990,7 @@ namespace Emby.Server.Implementations.Session
             return SendMessageToSession(session, "GeneralCommand", command, cancellationToken);
         }
 
-        private async Task SendMessageToSession<T>(SessionInfo session, string name, T data, CancellationToken cancellationToken)
+        private static async Task SendMessageToSession<T>(SessionInfo session, string name, T data, CancellationToken cancellationToken)
         {
             var controllers = session.SessionControllers.ToArray();
             var messageId = Guid.NewGuid().ToString("N");
@@ -1192,11 +1189,11 @@ namespace Emby.Server.Implementations.Session
         {
             if (session == null)
             {
-                throw new ArgumentNullException("session");
+                throw new ArgumentNullException(nameof(session));
             }
             if (controllingSession == null)
             {
-                throw new ArgumentNullException("controllingSession");
+                throw new ArgumentNullException(nameof(controllingSession));
             }
         }
 
@@ -1490,7 +1487,7 @@ namespace Emby.Server.Implementations.Session
 
             if (string.IsNullOrEmpty(accessToken))
             {
-                throw new ArgumentNullException("accessToken");
+                throw new ArgumentNullException(nameof(accessToken));
             }
 
             var existing = _authRepo.Get(new AuthenticationInfoQuery
@@ -1611,7 +1608,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (item == null)
             {
-                throw new ArgumentNullException("item");
+                throw new ArgumentNullException(nameof(item));
             }
 
             var dtoOptions = _itemInfoDtoOptions;
@@ -1684,7 +1681,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (string.IsNullOrEmpty(itemId))
             {
-                throw new ArgumentNullException("itemId");
+                throw new ArgumentNullException(nameof(itemId));
             }
 
             //var item = _libraryManager.GetItemById(new Guid(itemId));
@@ -1726,7 +1723,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (info == null)
             {
-                throw new ArgumentNullException("info");
+                throw new ArgumentNullException(nameof(info));
             }
 
             var user = info.UserId.Equals(Guid.Empty)
diff --git a/Emby.Server.Implementations/Session/SessionWebSocketListener.cs b/Emby.Server.Implementations/Session/SessionWebSocketListener.cs
index 3bb022b32..116e455cf 100644
--- a/Emby.Server.Implementations/Session/SessionWebSocketListener.cs
+++ b/Emby.Server.Implementations/Session/SessionWebSocketListener.cs
@@ -1,4 +1,4 @@
-using MediaBrowser.Controller.Net;
+using MediaBrowser.Controller.Net;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.Events;
 using Microsoft.Extensions.Logging;
@@ -43,7 +43,6 @@ namespace Emby.Server.Implementations.Session
         /// <param name="loggerFactory">The logger factory.</param>
         /// <param name="json">The json.</param>
         /// <param name="httpServer">The HTTP server.</param>
-        /// <param name="serverManager">The server manager.</param>
         public SessionWebSocketListener(ISessionManager sessionManager, ILoggerFactory loggerFactory, IJsonSerializer json, IHttpServer httpServer)
         {
             _sessionManager = sessionManager;
@@ -71,7 +70,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (queryString == null)
             {
-                throw new ArgumentNullException("queryString");
+                throw new ArgumentNullException(nameof(queryString));
             }
 
             var token = queryString["api_key"];
diff --git a/Emby.Server.Implementations/Session/WebSocketController.cs b/Emby.Server.Implementations/Session/WebSocketController.cs
index bdae5cf8f..ed34f8721 100644
--- a/Emby.Server.Implementations/Session/WebSocketController.cs
+++ b/Emby.Server.Implementations/Session/WebSocketController.cs
@@ -31,23 +31,11 @@ namespace Emby.Server.Implementations.Session
             Sockets = new List<IWebSocketConnection>();
         }
 
-        private bool HasOpenSockets
-        {
-            get { return GetActiveSockets().Any(); }
-        }
+        private bool HasOpenSockets => GetActiveSockets().Any();
 
-        public bool SupportsMediaControl
-        {
-            get { return HasOpenSockets; }
-        }
+        public bool SupportsMediaControl => HasOpenSockets;
 
-        public bool IsSessionActive
-        {
-            get
-            {
-                return HasOpenSockets;
-            }
-        }
+        public bool IsSessionActive => HasOpenSockets;
 
         private IEnumerable<IWebSocketConnection> GetActiveSockets()
         {