Why people use ProjectData

Question

Recently I looked at some coding at the web. I found some people use Microsoft.VisualBasic.CompilerServices.ProjectData.ProjectData class in catch block.

 catch (Exception exception1)
        {
            //ProjectData.SetProjectError(exception1);
            Console.WriteLine(exception1.ToString());
            Console.WriteLine();
            Console.WriteLine(sSQL);
            //ProjectData.ClearProjectError();
        }

I searched it on msdn that mentioned that this API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

I am curious what reason people use it. Would you explain it to me?

Answer 1

My experience has been that this type of code use is found in c#/VB.NET projects that have been converted from VB6. When developing new c#/VB.NET solutions/projects, this practice should not be used.

Note: This technique can safely be replaced with proper exception handling that you would be used to seeing in other .NET solutions/projects.

Answer 2

This code is either emitted by a code conversion tool that converted VB code to C#, or resulted from decompiling an assembly that was originally created using VB.

I'm porting a VB project to Mono, and found out that the VB compiler injects these calls ProjectData.SetProjectError(exception) and ProjectData.ClearProjectError() in any catch block, and try to find a way to prevent the compiler from doing so because Mono doesn't implement the ProjectData module. And found your question while doing my research!