diff --git a/src/AddIns/BackendBindings/CSharpBinding/Project/Resources/BuildOptions.xfrm b/src/AddIns/BackendBindings/CSharpBinding/Project/Resources/BuildOptions.xfrm
index 222f879854..5c0b04436c 100644
--- a/src/AddIns/BackendBindings/CSharpBinding/Project/Resources/BuildOptions.xfrm
+++ b/src/AddIns/BackendBindings/CSharpBinding/Project/Resources/BuildOptions.xfrm
@@ -1,7 +1,7 @@
 <Components version="1.0">
   <System.Windows.Forms.UserControl>
     <Name value="XmlUserControl1" />
-    <ClientSize value="{Width=527, Height=633}" />
+    <ClientSize value="{Width=527, Height=657}" />
     <AutoScroll value="True" />
     <Controls>
       <System.Windows.Forms.GroupBox>
@@ -68,16 +68,31 @@
         <Name value="outputGroupBox" />
         <Location value="{X=3,Y=161}" />
         <Text value="${res:Dialog.ProjectOptions.Build.Output}" />
-        <Size value="{Width=521, Height=270}" />
+        <Size value="{Width=521, Height=299}" />
         <TabIndex value="1" />
         <Anchor value="Top, Left, Right" />
         <Controls>
+          <System.Windows.Forms.ComboBox>
+            <Name value="targetFrameworkComboBox" />
+            <TabIndex value="8" />
+            <Size value="{Width=121, Height=21}" />
+            <DropDownStyle value="DropDownList" />
+            <Location value="{X=164,Y=112}" />
+          </System.Windows.Forms.ComboBox>
+          <System.Windows.Forms.Label>
+            <Name value="targetFrameworkLabel" />
+            <Location value="{X=13,Y=112}" />
+            <Text value="${res:Dialog.ProjectOptions.Build.TargetFramework}" />
+            <TextAlign value="MiddleRight" />
+            <Size value="{Width=150, Height=23}" />
+            <TabIndex value="7" />
+          </System.Windows.Forms.Label>
           <System.Windows.Forms.GroupBox>
             <Name value="advancedOutputGroupBox" />
-            <Location value="{X=6,Y=115}" />
+            <Location value="{X=6,Y=138}" />
             <Text value="${res:Dialog.ProjectOptions.Build.Advanced}" />
-            <Size value="{Width=505, Height=149}" />
-            <TabIndex value="7" />
+            <Size value="{Width=505, Height=155}" />
+            <TabIndex value="9" />
             <Anchor value="Top, Bottom, Left, Right" />
             <Controls>
               <System.Windows.Forms.ComboBox>
@@ -157,7 +172,6 @@
             <Name value="debugInfoComboBox" />
             <TabIndex value="6" />
             <Size value="{Width=121, Height=21}" />
-            <FormattingEnabled value="True" />
             <DropDownStyle value="DropDownList" />
             <Location value="{X=164,Y=88}" />
           </System.Windows.Forms.ComboBox>
@@ -213,7 +227,7 @@
       </System.Windows.Forms.GroupBox>
       <System.Windows.Forms.GroupBox>
         <Name value="treatWarningsAsErrorsGroupBox" />
-        <Location value="{X=3,Y=523}" />
+        <Location value="{X=3,Y=552}" />
         <UseCompatibleTextRendering value="True" />
         <Text value="${res:Dialog.ProjectOptions.Build.TreatWarningsAsErrors}" />
         <Size value="{Width=521, Height=100}" />
@@ -255,7 +269,7 @@
       </System.Windows.Forms.GroupBox>
       <System.Windows.Forms.GroupBox>
         <Name value="warningsGroupBox" />
-        <Location value="{X=3,Y=437}" />
+        <Location value="{X=3,Y=466}" />
         <Text value="${res:Dialog.ProjectOptions.Build.ErrorsAndWarnings}" />
         <Size value="{Width=521, Height=80}" />
         <TabIndex value="2" />
diff --git a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/OptionPanels/BuildOptions.cs b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/OptionPanels/BuildOptions.cs
index 49790c8dd4..495bbf8441 100644
--- a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/OptionPanels/BuildOptions.cs
+++ b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/OptionPanels/BuildOptions.cs
@@ -29,6 +29,8 @@ namespace CSharpBinding.OptionPanels
 			
 			InitOutputPath();
 			InitXmlDoc();
+			InitTargetFramework(CSharpProject.DefaultTargetsFile,
+			                    @"$(SharpDevelopBinPath)\SharpDevelop.Build.CSharp.targets");
 			
 			ConfigurationGuiBinding b;
 			
diff --git a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs
index 190dc30f20..255af68bb0 100644
--- a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs
+++ b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs
@@ -50,10 +50,12 @@ namespace CSharpBinding
 			Create(info);
 		}
 		
+		public const string DefaultTargetsFile = @"$(MSBuildBinPath)\Microsoft.CSharp.Targets";
+		
 		protected override void Create(ProjectCreateInformation information)
 		{
 			base.Create(information);
-			imports.Add(@"$(MSBuildBinPath)\Microsoft.CSharp.Targets");
+			imports.Add(DefaultTargetsFile);
 			SetProperty("Debug", null, "CheckForOverflowUnderflow", "True", PropertyStorageLocations.ConfigurationSpecific);
 			SetProperty("Release", null, "CheckForOverflowUnderflow", "False", PropertyStorageLocations.ConfigurationSpecific);
 		}
diff --git a/src/AddIns/BackendBindings/VBNetBinding/Project/Src/Project/VBNetProject.cs b/src/AddIns/BackendBindings/VBNetBinding/Project/Src/Project/VBNetProject.cs
index f5ce99caaa..d06a1dfde2 100644
--- a/src/AddIns/BackendBindings/VBNetBinding/Project/Src/Project/VBNetProject.cs
+++ b/src/AddIns/BackendBindings/VBNetBinding/Project/Src/Project/VBNetProject.cs
@@ -59,11 +59,13 @@ namespace VBNetBinding
 			IdGuid = BaseConfiguration["ProjectGuid"];
 		}
 		
+		public const string DefaultTargetsFile = @"$(MSBuildBinPath)\Microsoft.VisualBasic.Targets";
+		
 		public VBNetProject(ProjectCreateInformation info)
 		{
 			InitVB();
 			Create(info);
-			imports.Add(@"$(MSBuildBinPath)\Microsoft.VisualBasic.Targets");
+			imports.Add(DefaultTargetsFile);
 		}
 		
 		public override ParseProjectContent CreateProjectContent()
diff --git a/src/Libraries/ICSharpCode.Build.Tasks/Project/ICSharpCode.Build.Tasks.csproj b/src/Libraries/ICSharpCode.Build.Tasks/Project/ICSharpCode.Build.Tasks.csproj
index e99d7a9766..1f78783456 100644
--- a/src/Libraries/ICSharpCode.Build.Tasks/Project/ICSharpCode.Build.Tasks.csproj
+++ b/src/Libraries/ICSharpCode.Build.Tasks/Project/ICSharpCode.Build.Tasks.csproj
@@ -35,5 +35,10 @@
     <Compile Include="Constants.cs" />
     <Compile Include="MyToolTask.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="SharpDevelop.Build.CSharp.targets">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.CSharp.targets b/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.CSharp.targets
new file mode 100644
index 0000000000..e19571fefa
--- /dev/null
+++ b/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.CSharp.targets
@@ -0,0 +1,61 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+	<!-- This file can be used to compile C# applications against other .NET Framework versions -->
+	
+	<PropertyGroup Condition=" '$(TargetFrameworkVersion)' == 'v1.0' ">
+		<CscToolPath>$(SystemRoot)\Microsoft.NET\Framework\v1.0.3705</CscToolPath>
+		<SharpDevelopUse1xCompiler>true</SharpDevelopUse1xCompiler>
+	</PropertyGroup>
+	<PropertyGroup Condition=" '$(TargetFrameworkVersion)' == 'v1.1' ">
+		<CscToolPath>$(SystemRoot)\Microsoft.NET\Framework\v1.1.4322</CscToolPath>
+		<SharpDevelopUse1xCompiler>true</SharpDevelopUse1xCompiler>
+	
+		<!-- Work around MsBuild problem: Microsoft.CSharp.targets adds NoWarn entries that -->
+		<!-- don't exist in v1.1 when version is set to anything else than v1.0 -->
+		<TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
+	</PropertyGroup>
+	<PropertyGroup Condition=" '$(SharpDevelopUse1xCompiler)' == 'true' ">
+		<UseHostCompilerIfAvailable>false</UseHostCompilerIfAvailable>
+		<PlatformTarget/>
+	</PropertyGroup>
+	
+	<!-- Use Microsoft's C# standard targets -->
+	<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+	
+	<!-- Override properties created by Microsoft.CSharp.targets -->
+	<PropertyGroup Condition=" '$(SharpDevelopUse1xCompiler)' == 'true' ">
+		<AssemblySearchPaths>
+		{CandidateAssemblyFiles};
+		$(ReferencePath);
+		{HintPathFromItem};
+		{TargetFrameworkDirectory};
+		{AssemblyFolders};
+		$(OutputPath);
+		{GAC}
+		</AssemblySearchPaths>
+		
+		<TargetFrameworkDirectory>$(CscToolPath)</TargetFrameworkDirectory>
+	</PropertyGroup>
+	
+	<ItemGroup Condition=" '$(SharpDevelopUse1xCompiler)' == 'true' ">
+		<TargetFrameworkDirectoryItem Include="$(CscToolPath)">
+			<InProject>false</InProject>
+		</TargetFrameworkDirectoryItem>
+	</ItemGroup>
+	
+	<!-- GetFrameworkPaths overwrites TargetFrameworkDirectory, so modify it -->
+	<!-- to be inactive if SharpDevelopUse1xCompiler is set. -->
+	<Target Name="GetFrameworkPaths" DependsOnTargets="$(GetFrameworkPathsDependsOn)">
+		<Error Condition=" ('$(SharpDevelopUse1xCompiler)' == 'true') And !Exists('$(CscToolPath)\Csc.exe') "
+		       Text="Could not find the C# compiler in $(CscToolPath)."/>
+		
+		<GetFrameworkPath Condition=" '$(SharpDevelopUse1xCompiler)' != 'true' ">
+			<Output TaskParameter="Path" PropertyName="TargetFrameworkDirectory"/>
+			<Output TaskParameter="Path" ItemName="TargetFrameworkDirectoryItem"/>
+		</GetFrameworkPath>
+		
+		<GetFrameworkSDKPath Condition=" '$(SharpDevelopUse1xCompiler)' != 'true' ">
+			<Output TaskParameter="Path" PropertyName="TargetFrameworkSDKDirectory"/>
+			<Output TaskParameter="Path" ItemName="TargetFrameworkSDKDirectoryItem"/>
+		</GetFrameworkSDKPath>
+	</Target>
+</Project>
diff --git a/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.Common.targets b/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.Common.targets
index ecbd120c94..82d81441b7 100644
--- a/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.Common.targets
+++ b/src/Libraries/ICSharpCode.Build.Tasks/Project/SharpDevelop.Build.Common.targets
@@ -1,4 +1,5 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <!-- Base file for compilers in custom backend bindinds -->
 
     <UsingTask TaskName="Microsoft.Build.Tasks.CreateVisualBasicManifestResourceName" AssemblyName="Microsoft.Build.Tasks, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
 
diff --git a/src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/AbstractBuildOptions.cs b/src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/AbstractBuildOptions.cs
index ebbd1666b9..87a6caf359 100644
--- a/src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/AbstractBuildOptions.cs
+++ b/src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/AbstractBuildOptions.cs
@@ -169,5 +169,40 @@ namespace ICSharpCode.SharpDevelop.Gui.OptionPanels
 				}
 			};
 		}
+		
+		protected void InitTargetFramework(string defaultTargets, string extendedTargets)
+		{
+			const string TargetFrameworkProperty = "TargetFrameworkVersion";
+			debugInfoBinding = helper.BindStringEnum("targetFrameworkComboBox", TargetFrameworkProperty,
+			                                         "",
+			                                         new StringPair("", "Default (.NET 2.0)"),
+			                                         new StringPair("v1.0", ".NET 1.0"),
+			                                         new StringPair("v1.1", ".NET 1.1"),
+			                                         new StringPair("v2.0", ".NET 2.0"));
+			debugInfoBinding.CreateLocationButton("targetFrameworkLabel");
+			helper.Saved += delegate {
+				// Test if SharpDevelop-Build extensions are needed
+				MSBuildProject project = helper.Project;
+				bool needExtensions = false;
+				PropertyStorageLocations location;
+				foreach (string configuration in project.GetConfigurationNames()) {
+					foreach (string platform in project.GetPlatformNames()) {
+						string value = project.GetProperty(configuration, platform, TargetFrameworkProperty, "", out location);
+						if (value.Length > 0) {
+							needExtensions = true;
+						}
+					}
+				}
+				for (int i = 0; i < project.Imports.Count; i++) {
+					if (needExtensions) {
+						if (defaultTargets.Equals(project.Imports[i], StringComparison.InvariantCultureIgnoreCase))
+							project.Imports[i] = extendedTargets;
+					} else {
+						if (extendedTargets.Equals(project.Imports[i], StringComparison.InvariantCultureIgnoreCase))
+							project.Imports[i] = defaultTargets;
+					}
+				}
+			};
+		}
 	}
 }