make it clearer which C# compiler version to use

Author: pavelsavara

plugins/dotnet/ReadMe.txt

@@ -18,7 +18,9 @@ Microsoft C# Compiler and .NET SDK
 
 - Best option is to install Visual Studio C# Express 2010 or newer.
 
-- NOTE: Make sure you have csc.exe on PATH.
+- NOTE: Make sure you have csc.exe version 3.5 on PATH.
+Something like
+c:\Windows\Microsoft.NET\Framework\v3.5\csc.exe 
 
 Microsoft HTML Help 1 Compiler and Sandcastle Help File Builder
 ---------------------------------------------------------------

plugins/dotnet/mvnassembly.cmd

@@ -8,5 +8,6 @@
 
 @echo off
 
+set PATH=c:\Windows\Microsoft.NET\Framework\v3.5\;%PATH%
 mvn clean install ant:ant -DskipTests=false %*
 rem mvn eclipse:eclipse

plugins/dotnet/robocode.dotnet.ntests/src/AssemblyLoadTest.cs

@@ -5,6 +5,9 @@
  * which accompanies this distribution, and is available at
  * http://robocode.sourceforge.net/license/epl-v10.html
  */
+
+using System;
+using System.Runtime.InteropServices;
 using net.sf.robocode.dotnet.host.seed;
 using net.sf.robocode.dotnet.repository.root;
 using net.sf.robocode.repository;
@@ -20,6 +23,10 @@ public class AssemblyLoadTest : TestBase
         [Test]
         public void testDomain()
         {
+            Console.WriteLine("clr.arch            :" + ((IntPtr.Size == 8) ? "64bit" : "32bit"));
+            Console.WriteLine("clr.version         :" + RuntimeEnvironment.GetSystemVersion());
+            Console.Out.Flush();
+
             string[] strings = DllRootHelper.findItems(@"file:/" + typeof(MyFirstRobot).Assembly.Location);
             Assert.GreaterOrEqual(strings.Length, 5);
         }