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/Plugins/BasePluginOfT.cs b/MediaBrowser.Common/Plugins/BasePluginOfT.cs
index afda83a7c..0da5592d3 100644
--- a/MediaBrowser.Common/Plugins/BasePluginOfT.cs
+++ b/MediaBrowser.Common/Plugins/BasePluginOfT.cs
@@ -164,10 +164,7 @@ namespace MediaBrowser.Common.Plugins
         /// <inheritdoc />
         public virtual void UpdateConfiguration(BasePluginConfiguration configuration)
         {
-            if (configuration == null)
-            {
-                throw new ArgumentNullException(nameof(configuration));
-            }
+            ArgumentNullException.ThrowIfNull(configuration);
 
             Configuration = (TConfigurationType)configuration;