添加对 Core 的直接引用

RhythmBaseCore/Exceptions/UnreadableEventException.cs

@@ -0,0 +1,19 @@
+using RhythmBase.Events;
+namespace RhythmBase.Exceptions
+{
+	/// <summary>
+	/// Exception thrown when an event is unreadable.
+	/// </summary>
+	/// <remarks>
+	/// Initializes a new instance of the <see cref="UnreadableEventException"/> class with a specified error message and the unreadable event item.
+	/// </remarks>
+	/// <param name="message">The message that describes the error.</param>
+	/// <param name="item">The unreadable event item.</param>
+	public class UnreadableEventException(string message, IBaseEvent item) : RhythmBaseException(message)
+	{
+		/// <summary>
+		/// Gets the unreadable event item.
+		/// </summary>
+		public IBaseEvent Item { get; } = item;
+	}
+}