Add custom id to IMessageComponent

src/Discord.Net.Core/Entities/Interactions/Message Components/ActionRowComponent.cs

@@ -20,10 +20,14 @@ namespace Discord
         /// </summary>
         public IReadOnlyCollection<IMessageComponent> Components { get; internal set; }
 
+        
+
         internal ActionRowComponent() { }
         internal ActionRowComponent(List<IMessageComponent> components)
         {
             this.Components = components;
         }
+
+        string IMessageComponent.CustomId => null;
     }
 }

src/Discord.Net.Core/Entities/Interactions/Message Components/ButtonComponent.cs

@@ -57,7 +57,5 @@ namespace Discord
             this.Url = url;
             this.Disabled = disabled;
         }
-
-
     }
 }

src/Discord.Net.Core/Entities/Interactions/Message Components/IMessageComponent.cs

@@ -6,11 +6,19 @@ using System.Threading.Tasks;
 
 namespace Discord
 {
+    /// <summary>
+    ///     Represents a message component on a message.
+    /// </summary>
     public interface IMessageComponent
     {
         /// <summary>
-        ///     The <see cref="ComponentType"/> of this Message Component.
+        ///     Gets the <see cref="ComponentType"/> of this Message Component.
         /// </summary>
-        public ComponentType Type { get; }
+        ComponentType Type { get; }
+
+        /// <summary>
+        ///     Gets the custom id of the component if possible; otherwise <see langword="null"/>.
+        /// </summary>
+        string CustomId { get; }
     }
 }