Made classes static.

runtime/ByteCodeHelper.cs

@@ -30,7 +30,7 @@ using IKVM.Internal;
 
 namespace IKVM.Runtime
 {
-	public class ByteCodeHelper
+	public static class ByteCodeHelper
 	{
 		[DebuggerStepThroughAttribute]
 		public static object multianewarray(RuntimeTypeHandle typeHandle, int[] lengths)

runtime/tracer.cs

@@ -30,7 +30,7 @@ using System.Configuration;
 
 namespace IKVM.Internal
 {
-	public class Tracer
+	public static class Tracer
 	{
 #if !COMPACT_FRAMEWORK
 		public readonly static TraceSwitch Compiler = new TraceSwitch("compiler", "Static Compiler");