Merge pull request #50 from linquize/prefer32-bug

AnyCPU 32-bit Preferred should only be available for .NET 4.5 projects

src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/BuildAdvanced.xaml.cs

@@ -60,7 +60,9 @@ namespace ICSharpCode.SharpDevelop.Gui.OptionPanels
 			this.TargetCPU = new List<KeyItemPair>();
 			supports32BitPreferred = false;
 			if (DotnetDetection.IsDotnet45Installed()) {
-				supports32BitPreferred = projectOptions.Project.MinimumSolutionVersion >= Solution.SolutionVersionVS2010;
+				var upgradableProject = projectOptions.Project as IUpgradableProject;
+				if (upgradableProject != null && upgradableProject.CurrentTargetFramework.IsBasedOn(TargetFramework.Net45))
+					supports32BitPreferred = projectOptions.Project.MinimumSolutionVersion >= Solution.SolutionVersionVS2010;
 				// Show 32 vs. 64 options even for library projects;
 				// it's relevant for web applications.
 			}

src/Main/Base/Project/Src/Project/Behaviors/DotNetStartBehavior.cs

@@ -114,7 +114,7 @@ namespace ICSharpCode.SharpDevelop.Project
 			if (fx != null)
 				UpdateAppConfig(fx);
 			if (Project.OutputType != OutputType.Library) {
-				if (DotnetDetection.IsDotnet45Installed()) {
+				if (DotnetDetection.IsDotnet45Installed() && fx.IsBasedOn(TargetFramework.Net45)) {
 					Project.SetProperty(null, Project.ActivePlatform, "Prefer32Bit", "True", PropertyStorageLocations.PlatformSpecific, true);
 				} else {
 					Project.SetProperty(null, Project.ActivePlatform, "PlatformTarget", "x86", PropertyStorageLocations.PlatformSpecific, true);