LangVersion in solution with C# and VB projects

[Drake53]

The docs mention using a Directory.Build.props file to configure the LangVersion of multiple projects. However, in a solution with both C# and visual basic projects, the possible LangVersion values for C# are incompatible with those for VB. For example, if I try setting the C# LangVersion to 8.0 (which is required to enable NRT in .NET framework), I will get a build error in the VB projects.

It would be nice if the docs could mention this possible issue, and provide a solution if one exists. For example, is there a condition that can be placed on the PropertyGroup that only evaluates to true for C# projects?

As a workaround, I put all VB projects in a separate directory with an empty Directory.Build.props file.

Relevant docs: https://github.com/dotnet/docs/blob/26e2e8bedfa72ae518de2b7e617850dd2c6d9d77/docs/csharp/language-reference/configure-language-version.md#configure-multiple-projects https://github.com/dotnet/docs/blob/26e2e8bedfa72ae518de2b7e617850dd2c6d9d77/docs/visual-basic/language-reference/configure-language-version.md#configure-multiple-projects

edit by @billwagner: Add document block.

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Document Details

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• ID: 5694e62b-c756-1f62-4014-2ceafa54c011
• Version Independent ID: 3f01c378-22e4-197c-a862-ab4a924506c7
• Content: C# language versioning - C# Guide
• Content Source: docs/csharp/language-reference/configure-language-version.md
• Product: dotnet-csharp
• Technology: csharp-language-reference
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

[BillWagner]

closing and reopening to run the labeler