Convert generic List/Enumerable to DataTable?

Question

I have few methods that returns different Generic Lists.

Exists in .net any class static method or whatever to convert any list into a datatable? The only thing tha

Answer 1

A 2019 answer if you're using .NET Core - use the Nuget ToDataTable library. Advantages:

• Better performance than FastMember
• Also creates structured SqlParameters for use as SQL Server Table-Valued Parameters

Disclaimer - I'm the author of ToDataTable

Performance - I span up some Benchmark .Net tests and included them in the ToDataTable repo. The results were as follows:

Creating a 100,000 Row Datatable:

                           MacOS         Windows
Reflection                 818.5 ms      818.3 ms
FastMember from           1105.5 ms      976.4 ms
 Mark's answer
Improved FastMember        524.6 ms      456.4 ms
ToDataTable                449.0 ms      376.5 ms

The FastMember method suggested in Marc's answer seemed to perform worse than Mary's answer which used reflection, but I rolled another method using a FastMember TypeAccessor and it performed much better. Nevertheless the ToDataTable package outperformed the lot.