Create new projects as Any CPU (32-bit) if the .NET 4.5 framework is installed.

Any CPU (32-bit) also works with older target frameworks as those interpret the 32-bit preferred flag as 32-bit required; but we require the new compiler version.

data/templates/project/CSharp/ConsoleProject.xpt

@@ -17,7 +17,7 @@
 	</Actions>
 	
 	<!-- Template Content -->
-	<Project language = "C#" defaultPlatform="x86">
+	<Project language = "C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/CSharp/FormsProject.xpt

@@ -18,7 +18,7 @@
 		<Open filename = "MainForm.cs"/>
 	</Actions>
 	
-	<Project language = "C#" defaultPlatform="x86">
+	<Project language = "C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/CSharp/NotifyIcon.xpt

@@ -18,7 +18,7 @@
 		<Open filename = "NotificationIcon.cs"/>
 	</Actions>
 	
-	<Project language="C#" defaultPlatform="x86">
+	<Project language="C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/CSharp/Service.xpt

@@ -19,7 +19,7 @@
 	</Actions>
 
 	<!-- Template Content -->
-	<Project language = "C#" defaultPlatform="x86">
+	<Project language = "C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Configuration.Install" />

data/templates/project/CSharp/WPFApplication.xpt

@@ -16,7 +16,7 @@
 		<Open filename = "Window1.xaml"/>
 	</Actions>
 	
-	<Project language = "C#" defaultPlatform="x86">
+	<Project language = "C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/CSharp/WPFNavigationApplication.xpt

@@ -16,7 +16,7 @@
 		<Open filename = "Page1.xaml"/>
 	</Actions>
 	
-	<Project language = "C#" defaultPlatform="x86">
+	<Project language = "C#">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/VB/ConsoleProject.xpt

@@ -20,7 +20,7 @@
 	
 
 	<!-- Template Content -->
-	<Project language = "VBNet" defaultPlatform="x86">
+	<Project language = "VBNet">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/VB/FormsProject.xpt

@@ -19,7 +19,7 @@
 	</Actions>
 	
 	<!-- Template Content -->
-	<Project language="VBNet" defaultPlatform="x86">
+	<Project language="VBNet">
 		<PropertyGroup>
 			<OutputType>WinExe</OutputType>
 			<AppDesignerFolder>Properties</AppDesignerFolder>

data/templates/project/VB/NotifyIcon.xpt

@@ -18,7 +18,7 @@
 		<Open filename = "NotificationIcon.vb"/>
 	</Actions>
 	
-	<Project language="VBNet" defaultPlatform="x86">
+	<Project language="VBNet">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/VB/Service.xpt

@@ -18,7 +18,7 @@
 		<Open filename = "${ProjectName}.vb"/>
 	</Actions>
 	
-	<Project language="VBNet" defaultPlatform="x86">
+	<Project language="VBNet">
 		<PropertyGroup>
 			<OutputType>Exe</OutputType>
 			<AppDesignerFolder>Properties</AppDesignerFolder>

data/templates/project/VB/WPFApplication.xpt

@@ -16,7 +16,7 @@
 		<Open filename = "MainWindow.xaml"/>
 	</Actions>
 	
-	<Project language = "VBNet" defaultPlatform="x86">
+	<Project language = "VBNet">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

data/templates/project/VB/WPFNavigationApplication.xpt

@@ -16,7 +16,7 @@
 		<Open filename = "Page1.xaml"/>
 	</Actions>
 	
-	<Project language = "VBNet" defaultPlatform="x86">
+	<Project language = "VBNet">
 		<ProjectItems>
 			<Reference Include="System" />
 			<Reference Include="System.Data" />

src/Main/Base/Project/ICSharpCode.SharpDevelop.csproj

@@ -28,7 +28,6 @@
     <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <TargetFrameworkProfile>
     </TargetFrameworkProfile>
-    <ApplicationIcon>..\..\StartUp\Project\Resources\SharpDevelop.ico</ApplicationIcon>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DebugType>Full</DebugType>

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

@@ -61,9 +61,8 @@ namespace ICSharpCode.SharpDevelop.Gui.OptionPanels
 			supports32BitPreferred = false;
 			if (DotnetDetection.IsDotnet45Installed()) {
 				supports32BitPreferred = projectOptions.Project.MinimumSolutionVersion >= Solution.SolutionVersionVS2010;
-				var compilableProject = projectOptions.Project as CompilableProject;
-				if (compilableProject != null && compilableProject.OutputType == OutputType.Library)
-					supports32BitPreferred = false;
+				// Show 32 vs. 64 options even for library projects;
+				// it's relevant for web applications.
 			}
 			if (supports32BitPreferred) {
 				this.TargetCPU.Add(new KeyItemPair("AnyCPU32", StringParser.Parse("${res:Dialog.ProjectOptions.Build.TargetCPU.Any32}")));

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

@@ -113,6 +113,13 @@ namespace ICSharpCode.SharpDevelop.Project
 			}
 			if (fx != null)
 				UpdateAppConfig(fx);
+			if (Project.OutputType != OutputType.Library) {
+				if (DotnetDetection.IsDotnet45Installed()) {
+					Project.SetProperty(null, Project.ActivePlatform, "Prefer32Bit", "True", PropertyStorageLocations.PlatformSpecific, true);
+				} else {
+					Project.SetProperty(null, Project.ActivePlatform, "TargetPlatform", "x86", PropertyStorageLocations.PlatformSpecific, true);
+				}
+			}
 			base.ProjectCreationComplete();
 		}