General using cleanup in C# files

This removes unnecessary using statements and moves them outside of the namespaces when they were inside them.

I cleaned up the headers a bit for several hundred files, but the cleanup there isn't exhaustive by any means. Changes are only to the tops of files.

To make this work a bit more cleanly I've added GlobalUsings.cs files to some of the assemblies.

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net5.0/App.xaml.cs

@@ -1,12 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows;
-
-namespace Company.WpfApplication1
+namespace Company.WpfApplication1
 {
     /// <summary>
     /// Interaction logic for App.xaml

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net5.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net5.0/MainWindow.xaml.cs

@@ -1,19 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
-namespace Company.WpfApplication1
+namespace Company.WpfApplication1
 {
     /// <summary>
     /// Interaction logic for MainWindow.xaml

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net6.0/App.xaml.cs

@@ -1,11 +1,4 @@
 #if (!csharpFeature_ImplicitUsings)
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows;
 #else
 using System.Configuration;
 using System.Data;

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net6.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/net6.0/MainWindow.xaml.cs

@@ -1,18 +1,4 @@
 #if (!csharpFeature_ImplicitUsings)
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 #else
 using System.Text;
 using System.Windows;

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/netcoreapp3.1/App.xaml.cs

@@ -1,12 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows;
-
-namespace Company.WpfApplication1
+namespace Company.WpfApplication1
 {
     /// <summary>
     /// Interaction logic for App.xaml

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/netcoreapp3.1/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-CSharp/netcoreapp3.1/MainWindow.xaml.cs

@@ -1,19 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
-namespace Company.WpfApplication1
+namespace Company.WpfApplication1
 {
     /// <summary>
     /// Interaction logic for MainWindow.xaml

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfClassLibrary-CSharp/net5.0/Class1.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Company.ClassLibrary1
 {
     public class Class1

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfClassLibrary-CSharp/net6.0/Class1.cs

@@ -1,5 +1,4 @@
 #if (!csharpFeature_ImplicitUsings)
-using System;
 #endif
 
 #if (csharpFeature_FileScopedNamespaces)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfClassLibrary-CSharp/netcoreapp3.1/Class1.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Company.ClassLibrary1
 {
     public class Class1

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/net5.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/net5.0/CustomControl1.cs

@@ -1,19 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
-namespace Company.WpfCustomControlLibrary
+namespace Company.WpfCustomControlLibrary
 {
     /// <summary>
     /// Follow steps 1a or 1b and then 2 to use this custom control in a XAML file.

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/net6.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/net6.0/CustomControl1.cs

@@ -1,18 +1,4 @@
 #if (!csharpFeature_ImplicitUsings)
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 #else
 using System.Text;
 using System.Windows;

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/netcoreapp3.1/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfCustomControlLibrary-CSharp/netcoreapp3.1/CustomControl1.cs

@@ -1,19 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
-namespace Company.WpfCustomControlLibrary
+namespace Company.WpfCustomControlLibrary
 {
     /// <summary>
     /// Follow steps 1a or 1b and then 2 to use this custom control in a XAML file.

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/net5.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/net5.0/UserControl1.xaml.cs

@@ -1,18 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
 namespace Company.WpfControlLibrary
 {
     /// <summary>

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/net6.0/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/net6.0/UserControl1.xaml.cs

@@ -1,18 +1,4 @@
 #if (!csharpFeature_ImplicitUsings)
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 #else
 using System.Text;
 using System.Windows;

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/netcoreapp3.1/AssemblyInfo.cs

@@ -1,6 +1,4 @@
-using System.Windows;
-
-[assembly:ThemeInfo(
+[assembly: ThemeInfo(
     ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
                                                 //(used if a resource is not found in the page,
                                                 // or application resource dictionaries)

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfUserControlLibrary-CSharp/netcoreapp3.1/UserControl1.xaml.cs

@@ -1,18 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
-
 namespace Company.WpfControlLibrary
 {
     /// <summary>

src/Microsoft.DotNet.Wpf/src/Common/Graphics/Generated/wgx_commands.cs

@@ -11,11 +11,8 @@
 
 // This code is generated from mcg\generators\CommandStructure.cs
 
-using System;
-using System.Windows.Media.Composition;
 using System.Runtime.InteropServices;
 using System.Windows.Media.Effects;
-using System.Security;
 
 using BOOL = System.UInt32;
 

src/Microsoft.DotNet.Wpf/src/Common/Graphics/exports.cs

@@ -6,32 +6,15 @@
 // Description:
 //     Managed exports from MIL core.
 
-using System;
-using System.Collections;
-using System.ComponentModel;
-using System.Threading;
-using System.Windows;
-using System.Windows.Media;
 using System.Windows.Media.Imaging;
-using System.Windows.Media.Effects;
-using System.Windows.Media.Media3D;
 using System.Runtime.InteropServices;
-using System.Windows.Media.Animation;
 using MS.Internal;
-using MS.Internal.PresentationCore;
 using MS.Internal.Interop;
 using MS.Utility;
 using MS.Win32;
-using System.Diagnostics;
-using System.Collections.Generic;
-using System.Security;
-using Microsoft.Win32.SafeHandles;
-
-using UnsafeNativeMethods=MS.Win32.PresentationCore.UnsafeNativeMethods;
-using SafeNativeMethods=MS.Win32.PresentationCore.SafeNativeMethods;
-using HRESULT=MS.Internal.HRESULT;
-using SR=MS.Internal.PresentationCore.SR;
-using DllImport=MS.Internal.PresentationCore.DllImport;
+
+using UnsafeNativeMethods = MS.Win32.PresentationCore.UnsafeNativeMethods;
+using HRESULT = MS.Internal.HRESULT;
 
 /*
  *

src/Microsoft.DotNet.Wpf/src/Common/Graphics/wgx_av_types.cs

@@ -2,9 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System;
-using System.Runtime.InteropServices;
-
 namespace System.Windows.Media
 {
     //

src/Microsoft.DotNet.Wpf/src/Common/Graphics/wgx_core_types.cs

@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-
-using System;
 using System.Runtime.InteropServices;
 
 namespace System.Windows.Media.Composition

src/Microsoft.DotNet.Wpf/src/Common/Graphics/wgx_exports.cs

@@ -2,17 +2,11 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-
-using System;
 using System.Windows;
 using System.Windows.Media;
-using System.Windows.Media.Composition;
 using System.Windows.Media.Imaging;
 using System.Runtime.InteropServices;
 
-using System.Security;
-using MS.Internal.PresentationCore;
-
 namespace MS.Internal
 {
     #region MILRenderTargetBitmap