Use ArgumentNullException.ThrowIfNull helper method

Did a simple search/replace on the whole repo (except the RSSDP project)
This reduces LOC and should improve performance (methods containing a throw statement don't get inlined)

```
if \((\w+) == null\)
\s+\{
\s+throw new ArgumentNullException\((.*)\);
\s+\}
```

```
ArgumentNullException.ThrowIfNull($1);
```

3 files changed, 21 insertions, 84 deletions

diff --git a/Emby.Server.Implementations/Data/SqliteExtensions.cs b/Emby.Server.Implementations/Data/SqliteExtensions.cs
index 381eb92a8..736b8125d 100644
--- a/Emby.Server.Implementations/Data/SqliteExtensions.cs
+++ b/Emby.Server.Implementations/Data/SqliteExtensions.cs
@@ -54,10 +54,7 @@ namespace Emby.Server.Implementations.Data
 
         public static void RunQueries(this SQLiteDatabaseConnection connection, string[] queries)
         {
-            if (queries == null)
-            {
-                throw new ArgumentNullException(nameof(queries));
-            }
+            ArgumentNullException.ThrowIfNull(queries);
 
             connection.RunInTransaction(conn =>
             {
diff --git a/Emby.Server.Implementations/Data/SqliteItemRepository.cs b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
index 1b176e60d..9c9fa7383 100644
--- a/Emby.Server.Implementations/Data/SqliteItemRepository.cs
+++ b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
@@ -583,10 +583,7 @@ namespace Emby.Server.Implementations.Data
 
         public void SaveImages(BaseItem item)
         {
-            if (item == null)
-            {
-                throw new ArgumentNullException(nameof(item));
-            }
+            ArgumentNullException.ThrowIfNull(item);
 
             CheckDisposed();
 
@@ -617,10 +614,7 @@ namespace Emby.Server.Implementations.Data
         /// </exception>
         public void SaveItems(IEnumerable<BaseItem> items, CancellationToken cancellationToken)
         {
-            if (items == null)
-            {
-                throw new ArgumentNullException(nameof(items));
-            }
+            ArgumentNullException.ThrowIfNull(items);
 
             cancellationToken.ThrowIfCancellationRequested();
 
@@ -2085,10 +2079,7 @@ namespace Emby.Server.Implementations.Data
                 throw new ArgumentNullException(nameof(id));
             }
 
-            if (chapters == null)
-            {
-                throw new ArgumentNullException(nameof(chapters));
-            }
+            ArgumentNullException.ThrowIfNull(chapters);
 
             var idBlob = id.ToByteArray();
 
@@ -2557,10 +2548,7 @@ namespace Emby.Server.Implementations.Data
 
         public int GetCount(InternalItemsQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -2613,10 +2601,7 @@ namespace Emby.Server.Implementations.Data
 
         public List<BaseItem> GetItemList(InternalItemsQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -2794,10 +2779,7 @@ namespace Emby.Server.Implementations.Data
 
         public QueryResult<BaseItem> GetItems(InternalItemsQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -3174,10 +3156,7 @@ namespace Emby.Server.Implementations.Data
 
         public List<Guid> GetItemIdsList(InternalItemsQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -4837,10 +4816,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
         public List<string> GetPeopleNames(InternalPeopleQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -4880,10 +4856,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
 
         public List<PersonInfo> GetPeople(InternalPeopleQuery query)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             CheckDisposed();
 
@@ -4999,10 +4972,7 @@ AND Type = @InternalPersonType)");
                 throw new ArgumentNullException(nameof(itemId));
             }
 
-            if (ancestorIds == null)
-            {
-                throw new ArgumentNullException(nameof(ancestorIds));
-            }
+            ArgumentNullException.ThrowIfNull(ancestorIds);
 
             CheckDisposed();
 
@@ -5175,10 +5145,7 @@ AND Type = @InternalPersonType)");
 
         private QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetItemValues(InternalItemsQuery query, int[] itemValueTypes, string returnType)
         {
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             if (!query.Limit.HasValue)
             {
@@ -5531,10 +5498,7 @@ AND Type = @InternalPersonType)");
                 throw new ArgumentNullException(nameof(itemId));
             }
 
-            if (values == null)
-            {
-                throw new ArgumentNullException(nameof(values));
-            }
+            ArgumentNullException.ThrowIfNull(values);
 
             CheckDisposed();
 
@@ -5607,10 +5571,7 @@ AND Type = @InternalPersonType)");
                 throw new ArgumentNullException(nameof(itemId));
             }
 
-            if (people == null)
-            {
-                throw new ArgumentNullException(nameof(people));
-            }
+            ArgumentNullException.ThrowIfNull(people);
 
             CheckDisposed();
 
@@ -5710,10 +5671,7 @@ AND Type = @InternalPersonType)");
         {
             CheckDisposed();
 
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             var cmdText = _mediaStreamSaveColumnsSelectQuery;
 
@@ -5766,10 +5724,7 @@ AND Type = @InternalPersonType)");
                 throw new ArgumentNullException(nameof(id));
             }
 
-            if (streams == null)
-            {
-                throw new ArgumentNullException(nameof(streams));
-            }
+            ArgumentNullException.ThrowIfNull(streams);
 
             cancellationToken.ThrowIfCancellationRequested();
 
@@ -6107,10 +6062,7 @@ AND Type = @InternalPersonType)");
         {
             CheckDisposed();
 
-            if (query == null)
-            {
-                throw new ArgumentNullException(nameof(query));
-            }
+            ArgumentNullException.ThrowIfNull(query);
 
             var cmdText = _mediaAttachmentSaveColumnsSelectQuery;
 
@@ -6152,10 +6104,7 @@ AND Type = @InternalPersonType)");
                 throw new ArgumentException("Guid can't be empty.", nameof(id));
             }
 
-            if (attachments == null)
-            {
-                throw new ArgumentNullException(nameof(attachments));
-            }
+            ArgumentNullException.ThrowIfNull(attachments);
 
             cancellationToken.ThrowIfCancellationRequested();
 
diff --git a/Emby.Server.Implementations/Data/SqliteUserDataRepository.cs b/Emby.Server.Implementations/Data/SqliteUserDataRepository.cs
index ba86dc156..8d78d644d 100644
--- a/Emby.Server.Implementations/Data/SqliteUserDataRepository.cs
+++ b/Emby.Server.Implementations/Data/SqliteUserDataRepository.cs
@@ -133,10 +133,7 @@ namespace Emby.Server.Implementations.Data
         /// <inheritdoc />
         public void SaveUserData(long userId, string key, UserItemData userData, CancellationToken cancellationToken)
         {
-            if (userData == null)
-            {
-                throw new ArgumentNullException(nameof(userData));
-            }
+            ArgumentNullException.ThrowIfNull(userData);
 
             if (userId <= 0)
             {
@@ -154,10 +151,7 @@ namespace Emby.Server.Implementations.Data
         /// <inheritdoc />
         public void SaveAllUserData(long userId, UserItemData[] userData, CancellationToken cancellationToken)
         {
-            if (userData == null)
-            {
-                throw new ArgumentNullException(nameof(userData));
-            }
+            ArgumentNullException.ThrowIfNull(userData);
 
             if (userId <= 0)
             {
@@ -304,10 +298,7 @@ namespace Emby.Server.Implementations.Data
 
         public UserItemData GetUserData(long userId, List<string> keys)
         {
-            if (keys == null)
-            {
-                throw new ArgumentNullException(nameof(keys));
-            }
+            ArgumentNullException.ThrowIfNull(keys);
 
             if (keys.Count == 0)
             {