Update DEVELOPMENT.md

.github/DEVELOPMENT.md

@@ -2,6 +2,73 @@
 
 This page contains steps to build and run the .NET MAUI repository from source. If you are looking to build apps with .NET MAUI please head over to the [.NET MAUI documentation](https://docs.microsoft.com/dotnet/maui) to get started.
 
+## Requirements
+
+### .NET 6 SDK
+
+In most cases, when you have Visual Studio installed with the .NET workloads checked, these steps are not required.
+
+1. Install the latest .NET 6:  
+   - [Win (x64)](https://aka.ms/dotnet/6.0.1xx/daily/dotnet-sdk-win-x64.exe)   
+   - [macOS (x64)](https://aka.ms/dotnet/6.0.1xx/daily/dotnet-sdk-osx-x64.pkg)  
+   - [macOS (arm64)](https://aka.ms/dotnet/6.0.1xx/daily/dotnet-sdk-osx-arm64.pkg)
+2. Add this to your NuGet.config:  
+   ```xml
+    <add key="darc-pub-dotnet-runtime" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-6f411658/nuget/v3/index.json"  />
+    <add key="dotnet6" value="https://aka.ms/dotnet6/nuget/index.json" />
+    ```
+    
+    
+    
+   > NOTE: this is going to contain the "stable" versions of the packages, so you will have to clear the NuGet cache when this feed changes and when .NET ships. The various `darc-pub-dotnet-*` feeds are temporary and are generated on various builds. These feeds my disappear and be replaced with new ones as new builds come out. Make sure to verify that you are on the latest here and clear the nuget cache if it changes:  
+   > `dotnet nuget locals all --clear`
+
+### .NET MAUI Workload
+
+> You'll probably need to run these commands with elevated privileges:
+
+Install the .NET MAUI workload using the versions from a particular branch:  
+
+For example, the "preview.10" branch:
+```
+dotnet workload install maui `
+   --from-rollback-file https://aka.ms/dotnet/maui/preview.10.json `
+   --source https://aka.ms/dotnet6/nuget/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-6f411658/nuget/v3/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-1ec2e17f/nuget/v3/index.json
+```
+
+Or, the "main" branch:
+```
+dotnet workload install maui `
+   --from-rollback-file https://aka.ms/dotnet/maui/main.json `
+   --source https://aka.ms/dotnet6/nuget/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-6f411658/nuget/v3/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-1ec2e17f/nuget/v3/index.json
+```  
+
+If you are building maui yourself, then you probably want all the workloads:
+
+```
+dotnet workload install android ios maccatalyst tvos macos maui wasm-tools `
+   --from-rollback-file https://aka.ms/dotnet/maui/main.json `
+   --source https://aka.ms/dotnet6/nuget/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-6f411658/nuget/v3/index.json `
+   --source https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-1ec2e17f/nuget/v3/index.json
+```
+
+> NOTE: Zsh and Bash on macOS expect `\` instead for spanning commands over multiple lines.  The examples above are formatted for windows/powershell
+
+### iOS / MacCatalyst
+
+iOS and MacCatalyst will require Xcode 13.1 Stable. You can get this [here](https://developer.apple.com/download/more/?name=Xcode).
+
+### Android
+
+Android API-31 (Android 12) is now the default in .NET 6 rc1.
+
+
+
 ## Running
 
 ### .NET 6