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);
```

1 files changed, 1 insertions, 4 deletions

diff --git a/MediaBrowser.Common/Net/IPNetAddress.cs b/MediaBrowser.Common/Net/IPNetAddress.cs
index f1428d4be..98d1c2d97 100644
--- a/MediaBrowser.Common/Net/IPNetAddress.cs
+++ b/MediaBrowser.Common/Net/IPNetAddress.cs
@@ -160,10 +160,7 @@ namespace MediaBrowser.Common.Net
         /// <inheritdoc/>
         public override bool Contains(IPAddress address)
         {
-            if (address == null)
-            {
-                throw new ArgumentNullException(nameof(address));
-            }
+            ArgumentNullException.ThrowIfNull(address);
 
             if (address.IsIPv4MappedToIPv6)
             {