Use ReadOnlyCollectionBase for ProcessModuleCollection and...

Use ReadOnlyCollectionBase for ProcessModuleCollection and ProcessThreadCollection on unity profile to have compatibility with 2.0 profile (case 678271, case 614318)

mcs/class/System/System.Diagnostics/ProcessModuleCollection.cs

@@ -33,7 +33,7 @@ using System.Collections;
 
 namespace System.Diagnostics 
 {
-#if NET_2_1
+#if NET_2_1 && !UNITY
 	public class ProcessModuleCollectionBase : System.Collections.Generic.List<ProcessModule>
 	{
 		protected ProcessModuleCollectionBase InnerList {
@@ -43,10 +43,10 @@ namespace System.Diagnostics
 #endif
 
 	public class ProcessModuleCollection :
-#if !NET_2_1	
-		ReadOnlyCollectionBase
-#else
+#if NET_2_1 && !UNITY
 		ProcessModuleCollectionBase
+#else
+		ReadOnlyCollectionBase
 #endif
 	{
 		protected ProcessModuleCollection() 

mcs/class/System/System.Diagnostics/ProcessThreadCollection.cs

@@ -33,7 +33,7 @@ using System.Collections;
 
 namespace System.Diagnostics 
 {
-#if NET_2_1
+#if NET_2_1 && !UNITY
 	public class ProcessThreadCollectionBase : System.Collections.Generic.List<ProcessThread>
 	{
 		protected ProcessThreadCollectionBase InnerList {
@@ -49,10 +49,10 @@ namespace System.Diagnostics
 #endif
 
 	public class ProcessThreadCollection :
-#if !NET_2_1
-		ReadOnlyCollectionBase
-#else
+#if NET_2_1 && !UNITY
 		ProcessThreadCollectionBase
+#else
+		ReadOnlyCollectionBase
 #endif
 	{
 		protected ProcessThreadCollection()