Reduce some allocations with the magic of spans etc.

MediaBrowser.Model/Entities/ProviderIdsExtensions.cs

@@ -132,6 +132,36 @@ namespace MediaBrowser.Model.Entities
             }
         }
 
+        /// <summary>
+        /// Sets a provider id.
+        /// </summary>
+        /// <param name="instance">The instance.</param>
+        /// <param name="name">The name.</param>
+        /// <param name="value">The value.</param>
+        public static void SetProviderId(this IHasProviderIds instance, ReadOnlySpan<char> name, ReadOnlySpan<char> value)
+        {
+            if (instance == null)
+            {
+                throw new ArgumentNullException(nameof(instance));
+            }
+
+            // If it's null remove the key from the dictionary
+            if (value.IsEmpty)
+            {
+                instance.ProviderIds?.Remove(name.ToString());
+            }
+            else
+            {
+                // Ensure it exists
+                if (instance.ProviderIds == null)
+                {
+                    instance.ProviderIds = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+                }
+
+                instance.ProviderIds[name.ToString()] = value.ToString();
+            }
+        }
+
         /// <summary>
         /// Sets a provider id.
         /// </summary>