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diff --git a/ICSharpCode.Decompiler/FlowAnalysis/SsaBlock.cs b/ICSharpCode.Decompiler/FlowAnalysis/SsaBlock.cs
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+++ b/ICSharpCode.Decompiler/FlowAnalysis/SsaBlock.cs
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+// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace ICSharpCode.Decompiler.FlowAnalysis
+{
+	/// <summary>
+	/// A block in a control flow graph; with instructions represented by "SsaInstructions" (instructions use variables, no evaluation stack).
+	/// Usually these variables are in SSA form to make analysis easier.
+	/// </summary>
+	public sealed class SsaBlock
+	{
+		public readonly List<SsaBlock> Successors = new List<SsaBlock>();
+		public readonly List<SsaBlock> Predecessors = new List<SsaBlock>();
+		public readonly ControlFlowNodeType NodeType;
+		public readonly List<SsaInstruction> Instructions = new List<SsaInstruction>();
+		
+		/// <summary>
+		/// The block index in the control flow graph.
+		/// This correspons to the node index in ControlFlowGraph.Nodes, so it can be used to retrieve the original CFG node and look
+		/// up additional information (e.g. dominance).
+		/// </summary>
+		public readonly int BlockIndex;
+		
+		internal SsaBlock(ControlFlowNode node)
+		{
+			NodeType = node.NodeType;
+			BlockIndex = node.BlockIndex;
+		}
+		
+		public override string ToString()
+		{
+			StringWriter writer = new StringWriter();
+			writer.Write("Block #{0} ({1})", BlockIndex, NodeType);
+			foreach (SsaInstruction inst in Instructions) {
+				writer.WriteLine();
+				inst.WriteTo(writer);
+			}
+			return writer.ToString();
+		}
+	}
+}