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Editorial Team
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Asked: 2026-05-15T07:19:03+00:00

Whilst putting together a T4 template I threw in a simple lambda expression: <#=string.Join(,,

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Whilst putting together a T4 template I threw in a simple lambda expression:

<#=string.Join(",", updateFields.ConvertAll(field => field.Name).ToArray())#>

This causes the template to fail to generate with the error:

Compiling transformation: Invalid expression term '>'

On the line with the lambda expression.

This has been checked outside of a template and works fine. Does T4 not support working with lambda expressions? If not, are there any other language features that are unsupported in the context of a T4 template?

Thanks!

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1 Answer

  1. Editorial Team

    If you are using T4 in Visual Studio 2008, make sure that you have C# compiler version set to 3.5 in the template directive. It uses 2.0 by default.

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