Use TryAdd

MediaBrowser.LocalMetadata/Parsers/BaseItemXmlParser.cs

@@ -73,10 +73,7 @@ namespace MediaBrowser.LocalMetadata.Parsers
             foreach (var info in idInfos)
             {
                 var id = info.Key + "Id";
-                if (!_validProviderIds.ContainsKey(id))
-                {
-                    _validProviderIds.Add(id, info.Key);
-                }
+                _validProviderIds.TryAdd(id, info.Key);
             }
 
             // Additional Mappings

MediaBrowser.Providers/Manager/MetadataService.cs

@@ -882,10 +882,7 @@ namespace MediaBrowser.Providers.Manager
                 var key = providerId.Key;
 
                 // Don't replace existing Id's.
-                if (!lookupInfo.ProviderIds.ContainsKey(key))
-                {
-                    lookupInfo.ProviderIds[key] = providerId.Value;
-                }
+                lookupInfo.ProviderIds.TryAdd(key, providerId.Value);
             }
         }
 

MediaBrowser.Providers/Manager/ProviderManager.cs

@@ -780,10 +780,7 @@ namespace MediaBrowser.Providers.Manager
                         {
                             foreach (var providerId in result.ProviderIds)
                             {
-                                if (!existingMatch.ProviderIds.ContainsKey(providerId.Key))
-                                {
-                                    existingMatch.ProviderIds.Add(providerId.Key, providerId.Value);
-                                }
+                                existingMatch.ProviderIds.TryAdd(providerId.Key, providerId.Value);
                             }
 
                             if (string.IsNullOrWhiteSpace(existingMatch.ImageUrl))

MediaBrowser.XbmcMetadata/Parsers/BaseNfoParser.cs

@@ -100,10 +100,7 @@ namespace MediaBrowser.XbmcMetadata.Parsers
             foreach (var info in idInfos)
             {
                 var id = info.Key + "Id";
-                if (!_validProviderIds.ContainsKey(id))
-                {
-                    _validProviderIds.Add(id, info.Key);
-                }
+                _validProviderIds.TryAdd(id, info.Key);
             }
 
             // Additional Mappings