* Update global.json to use tools.dotnet from net5

* Update dependencies from https://github.com/dotnet/arcade build 20190905.21 (#1794)

- Microsoft.DotNet.ApiCompat - 1.0.0-beta.19455.21
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19455.21
- Microsoft.DotNet.CodeAnalysis - 1.0.0-beta.19455.21
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19455.21
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19455.21

* Fixing removal of None from Page under certain conditions (#1790) (#1796)

* Fixing removal of None from Page under certain conditions (EnableDefaultApplicationDefinition or EnableDefaultPageItems is false).
Further adding a fix to ensure this doesn't result in ApplicationDefinition being included in Page as well when EnableDefaultApplicationDefinition is false.

* Fixing removal of ApplicationDefinition from Page to be unconditional.

* Removing extraneous ApplicationDefinition

* Clarifying comments

* Update dependencies from https://github.com/dotnet/winforms build 20190906.5 (#1801)

- Microsoft.Private.Winforms - 4.8.1-preview1.19456.5

Dependency coherency updates

- Microsoft.Win32.Registry - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- Microsoft.NETCore.App - 3.0.0-rc1-19429-05 (parent: Microsoft.Private.Winforms)
- System.CodeDom - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Configuration.ConfigurationManager - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Diagnostics.EventLog - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.DirectoryServices - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Drawing.Common - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Reflection.Emit - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Reflection.MetadataLoadContext - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Security.AccessControl - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Security.Cryptography.Xml - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Security.Permissions - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Security.Principal.Windows - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.Windows.Extensions - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- Microsoft.NETCore.Platforms - 3.0.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- System.IO.Packaging - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App)
- Microsoft.NETCore.ILDAsm - 3.0.0-rc1.19428.6 (parent: Microsoft.NETCore.Runtime.CoreCLR)
- Microsoft.NETCore.Runtime.CoreCLR - 3.0.0-rc1.19428.6 (parent: Microsoft.NETCore.App)
- Microsoft.NETCore.ILAsm - 3.0.0-rc1.19428.6 (parent: Microsoft.NETCore.Runtime.CoreCLR)

* Update project TargetFramework(s) to netcoreapp5.0 and set TargetFrameworkVersion=v5.0

* Update dependencies from ".NET Core 5 Dev" and ".NET Tools - Latest" channels

* Add constants for 3.1 and 5.0

* Update netcore version specific conditions

* Add System.Resources.Extensions references to PresentationUI

* Include "ResolveTargetingPackAssets" in AfterTargets; Remove unused Targets

* Make projecttemplates and ArchNeutral use 5.x versionprefix

* Update project templatest for netcoreapp5.0 & re-enable  VB templates

* Remove AssemblyVersion - it will get automatically set to 5.0.0.0. This is important for WindowsBase. During conflict resolution, WindowsBase/5.0.0.0 will win over WindowsBase/4.0.0.0 from NetCore.App

* Update dependencies from ".NET Tools - Latest"

* Update dependencies from https://github.com/dotnet/arcade build 20190906.10 (#1810)

- Microsoft.DotNet.ApiCompat - 1.0.0-beta.19456.10
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19456.10
- Microsoft.DotNet.CodeAnalysis - 1.0.0-beta.19456.10
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19456.10
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19456.10

* Update dependencies from https://github.com/dotnet/winforms build 20190907.5 (#1812)

- Microsoft.Private.Winforms - 4.8.1-preview1.19457.5

* Update dependencies from https://github.com/dotnet/arcade build 20190907.1 (#1815)

- Microsoft.DotNet.ApiCompat - 1.0.0-beta.19457.1
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19457.1
- Microsoft.DotNet.CodeAnalysis - 1.0.0-beta.19457.1
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19457.1
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19457.1

* Update dependencies from https://github.com/dotnet/winforms build 20190908.4 (#1816)

- Microsoft.Private.Winforms - 4.8.1-preview1.19458.4

* Update dependencies from https://github.com/dotnet/arcade build 20190908.2 (#1821)

- Microsoft.DotNet.ApiCompat - 1.0.0-beta.19458.2
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19458.2
- Microsoft.DotNet.CodeAnalysis - 1.0.0-beta.19458.2
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19458.2
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19458.2

* Update dependencies from https://github.com/dotnet/winforms build 20190909.6 (#1822)

- Microsoft.Private.Winforms - 4.8.1-preview1.19459.6