Parallel.For not utilising all cores

Question

I\'m doing heavy mathematical computations using Math.Net Numerics parallely inside Parallel.For block.

When I run code in my local system

Answer 1

From MSDN

By default, For and ForEach will utilize however many threads the underlying scheduler provides, so changing MaxDegreeOfParallelism from the default only limits how many concurrent tasks will be used.

The way I read the documentation: if the underlying scheduler only offers a single thread, then setting MaxDegreeOfParallelism > 1 will still result in a single thread.