Migrating from PostSharp
You may want to migrate some or all of your projects from PostSharp to Metalama. If you decide to do so, this chapter will help you.
When we designed Metalama as the successor of PostSharp, we decided to break backward compatibility. After all, PostSharp Framework was designed in 2004-2010, the years of C# 2.0 and .NET Framework 2.0, and we have maintained backward compatibility since then. We could not take advantage of the new .NET stack (for example, C# 11, .NET 6, and Roslyn) by being loyal to our 2010 API. So, we opted for a complete redesign of the concepts and APIs.
However, we appreciate that many customers have tens of thousands to millions of lines of code that use PostSharp. This is why we made sure that we did not ask these customers to port those large code bases.
So we took the following decisions:
- You will need to rewrite your aspects completely_.
- The business code that only uses the aspects should not normally need any changes, except for find-and-replace-in-files and replacements of namespace imports replacements.
We hope this is an acceptable compromise.
In this chapter
| Article | Description |
|---|---|
| Migrating custom aspects to Metalama | This article gives the master step-by-step procedure for your migration project and refers to other articles in this chapter. |
| Benefits of Metalama over PostSharp | This article presents the benefits of Metalama over PostSharp. |
| When to migrate from PostSharp to Metalama | This article takes a step back and explains a few points to consider before migrating your aspects to Metalama. Make sure to read this article before taking any decision. |
| Status of the migration of PostSharp features to Metalama | This article describes the status of PostSharp features in Metalama. |
| Differences between Metalama and PostSharp | This article explains the significant differences between the architecture of PostSharp and the architecture of Metalama from a theoretical angle. |
| Migrating PostSharp attribute multicasting to Metalama | This article explains how to migrate PostSharp attribute multicasting to Metalama. |
| Migrating PostSharp configuration to Metalama | This article explains how to migrate PostSharp configuration files like postsharp.config to Metalama. |