The easiest way to describe what Mono currently supports is:
Everything in .NET 4.5 except WPF, WWF, and with limited WCF and limited ASP.NET 4.5 async stack.
System.Web and WCF are candidates for ‘almost immediate’ porting from the .NET reference source back to Mono, so support coverage may improve.
Here is a slightly more detailed view, by .NET framework version:
| | Implemented | | Partially Implemented | | Not Implemented |
.NET 4.6
.NET 4.5
| | C# 5.0 - async support |
| | Async Base Class Library Upgrade |
| | MVC4 - Partial, no async features supported. |
| | MVC5 - Partial, no async features supported. |
| | ASP.NET 4.5 Async Pipeline - Needs a parallel processing pipeline with async support, not done. |
.NET 4.0
| | C# 4.0 |
| | ASP.Net 4.0 |
| | ASP.Net MVC 1, MVC 2 and MVC3 |
| | System.Numerics |
| | Managed Extensibily Framework - Shared with .NET via MS-PL license |
| | Dynamic Language Runtime - Shared with .NET via MS-PL license |
| | Client side OData - Shared with .NET via MS-PL license |
| | EntityFramework - Available since Mono 2.11.3. |
| | Parallel Framework and PLINQ |
| | CodeContracts - API complete, partial tooling |
| | Server-side OData - Depends on Entity Framework. |
.NET 3.5
| | C# 3.0 |
| | System.Core |
| | LINQ |
| | ASP.Net 3.5 |
| | ASP.Net MVC |
| | LINQ to SQL - Mostly done, but a few features missing |
.NET 3.0
| | WCF - Silverlight 2.0 subset completed |
| | WPF - No plans to implement |
| | WWF - Will implement WWF 4 instead on future versions of Mono. |
.NET 2.0
| | C# 2.0 (generics) |
| | Core Libraries 2.0: mscorlib, System, System.Xml |
| | ASP.Net 2.0 - Except WebParts |
| | ADO.Net 2.0 |
| | Winforms/System.Drawing 2.0 - Does not support right-to-left |
.NET 1.1
| | C# 1.0 |
| | Core Libraries 1.1: mscorlib, System, System.Xml |
| | ASP.Net 1.1 |
| | ADO.Net 1.1 |
| | Winforms/System.Drawing 1.1 |
| | System.Transactions |
| | System.Management - Does not map to Linux |
| | System.EnterpriseServices - Deprecated |
