Merge pull request #1735 from icsharpcode/issue1729docsudpate

Document current dependencies for master

README.md

@@ -48,13 +48,11 @@ How to build
 ------------
 
 Windows:
-- Install Visual Studio (minimum version: 2019.2) with the following components:
-  - Workload ".NET Desktop Development"
-  - .NET Framework 4.6.2 Targeting Pack (if the VS installer does not offer this option, install the [.NET 4.6.2 developer pack](https://www.microsoft.com/en-us/download/details.aspx?id=53321) separately)
-  - Individual Component "MSVC v142 - VS 2019 C++ x64/x86 build tools (v14.22)" (or similar)
+- Install Visual Studio (documented version: 16.3) with the following components:
+  - Workload ".NET Desktop Development". This includes by default .NET Framework 4.8 SDK and the .NET Framework 4.7.2 targeting pack, as well as the .NET Core 3 SDK (ILSpy.csproj targets .NET 4.7.2, and ILSpy.sln uses SDK-style projects).
+  - Workload "Visual Studio extension development" (ILSpy.sln contains a VS extension project)
+  - Individual Component "MSVC v142 - VS 2019 C++ x64/x86 build tools (v14.23)" (or similar)
     - The VC++ toolset is optional; if present it is used for `editbin.exe` to modify the stack size used by ILSpy.exe from 1MB to 16MB, because the decompiler makes heavy use of recursion, where small stack sizes lead to problems in very complex methods.
-- Install the [.NET Core SDK 2.2](https://dotnet.microsoft.com/download)
-- Install the [.NET Core SDK 3](https://dotnet.microsoft.com/download/dotnet-core)
 - Check out the ILSpy repository using git.
 - Execute `git submodule update --init --recursive` to download the ILSpy-Tests submodule (used by some test cases).
 - Open ILSpy.sln in Visual Studio.
@@ -62,19 +60,12 @@ Windows:
   - Run project "ILSpy" for the ILSpy UI
   - Use the Visual Studio "Test Explorer" to see/run the tests
 
-Unix:
-- Make sure .NET Core 2.2 is installed (you can get it here: https://get.dot.net).
-- Make sure [.NET Core SDK 3](https://dotnet.microsoft.com/download/dotnet-core) is installed.
+Unix / Mac:
+- Make sure .NET Core 2.1 LTS Runtime is installed (you can get it here: https://get.dot.net).
+- Make sure [.NET Core 3 SDK](https://dotnet.microsoft.com/download/dotnet-core) is installed.
 - Check out the repository using git.
 - Execute `git submodule update --init --recursive` to download the ILSpy-Tests submodule (used by some test cases).
-- Use `dotnet build Frontends.sln` to build the non-Windows flavors of ILSpy (cli and powershell core).
-
-(Visual Studio for Mac users only:)
-- Edit `\ICSharpCode.Decompiler\ICSharpCode.Decompiler.csproj`
-  Add `Sdk="Microsoft.NET.Sdk"` to the `Project` element.
-  This is required due to a tooling issue.
-  Please do not commit this when contributing a pull request!
-- Use Frontends.sln to work.
+- Use `dotnet build Frontends.sln` to build the non-Windows flavors of ILSpy (.NET Core Global Tool and PowerShell Core).
 
 How to contribute
 -----------------