Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet).

Since v2.2.0:

• Student-T density more robust for very large degrees of freedom
• Sparse Kronecker product much more efficient (now leverages sparsity)
• Direct access to raw matrix storage implementations for advanced extensibility
• Now also separate package for signed core library with a strong name (we dropped strong names in v2.2.0)

Also available as NuGet packages:
PM> Install-Package MathNet.Numerics
PM> Install-Package MathNet.Numerics.FSharp

New: instead of the special Silverlight build we now provide a portable version supporting .Net 4, Silverlight 5 and .Net Core (WinRT) 4.5:
PM> Install-Package MathNet.Numerics.Portable

If you absolutely require a signed library with a strong name:
PM> Install-Package MathNet.Numerics.Signed