添加对 Core 的直接引用

RhythmBaseCore/Events/Borders.cs

@@ -0,0 +1,23 @@
+namespace RhythmBase.Events
+{
+	/// <summary>
+	/// Specifies the types of borders that can be applied.
+	/// </summary>
+	public enum Borders
+	{
+		/// <summary>
+		/// No border.
+		/// </summary>
+		None,
+
+		/// <summary>
+		/// An outline border.
+		/// </summary>
+		Outline,
+
+		/// <summary>
+		/// A glowing border.
+		/// </summary>
+		Glow
+	}
+}