May 2021 .NET Updates

The following .NET updates were released in May 2021. This issue will be updated if there are any additional releases during the month.

.NET

* [.NET May 2021 Updates – 5.0.6](https://devblogs.microsoft.com/dotnet/net-may-2021/)
* .NET 5.0.6 and .NET SDK 5.0.203 ([Release Notes](https://github.com/dotnet/core/blob/master/release-notes/5.0/5.0.6/5.0.6.md) | [Download](https://dotnet.microsoft.com/download/dotnet/5.0))
* .NET Core 3.1.15 and .NET SDK 3.1.115 ([Release Notes](https://github.com/dotnet/core/blob/master/release-notes/3.1/3.1.15/3.1.15.md) | [Download](https://dotnet.microsoft.com/download/dotnet-core/3.1))
* .NET Core 2.1.28 and .NET SDK 2.1.524 ([Release Notes](https://github.com/dotnet/core/blob/master/release-notes/2.1/2.1.28/2.1.28.md) | [Download](https://dotnet.microsoft.com/download/dotnet-core/2.1))

.NET Framework

* [.NET Framework May 2021 Security and Quality Rollup Update](https://devblogs.microsoft.com/dotnet/net-framework-may-2021-security-and-quality-rollup-updates/)
* [.NET Framework May 2021 Cumulative Update Preview](https://devblogs.microsoft.com/dotnet/net-framework-may-2021-cumulative-update-preview/)
* [.NET Framework May 2021 Cumulative Update Preview for Windows 10, versions 2004, 20H2, 21H1](https://devblogs.microsoft.com/dotnet/net-framework-may-2021-cumulative-update-preview-for-windows-10-versions-2004-20h2-21h1/)

.NET Support Policies

Microsoft support policies are defined in the following documents:

* [Microsoft .NET Support Policy](https://dotnet.microsoft.com/platform/support/policy/)
* [.NET Core OS Lifecycle Policy](https://github.com/dotnet/core/blob/master/os-lifecycle-policy.md)