33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
## Assemblies compiled with Regex.CompileToAssembly breaks between 4.0 and 4.5
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### Scope
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Minor
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### Version Introduced
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4.5
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### Source Analyzer Status
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Planned
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### Change Description
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If an assembly of compiled regular expressions is built with the .NET Framework 4.5 but targets the .NET Framework 4, attempting to use one of the regular expressions in that assembly on a system with .NET Framework 4 installed throws an exception.
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- [ ] Quirked
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- [ ] Build-time break
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### Recommended Action
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To work around this problem, you can do either of the following:
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- Build the assembly that contains the regular expressions with the .NET Framework 4.
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- Use an interpreted regular expression.
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### Affected APIs
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* `M:System.Text.RegularExpressions.Regex.CompileToAssembly(System.Text.RegularExpressions.RegexCompilationInfo[],System.Reflection.AssemblyName)`
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* `M:System.Text.RegularExpressions.Regex.CompileToAssembly(System.Text.RegularExpressions.RegexCompilationInfo[],System.Reflection.AssemblyName,System.Reflection.Emit.CustomAttributeBuilder[])`
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* `M:System.Text.RegularExpressions.Regex.CompileToAssembly(System.Text.RegularExpressions.RegexCompilationInfo[],System.Reflection.AssemblyName,System.Reflection.Emit.CustomAttributeBuilder[],System.String)`
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### Category
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Core
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<!-- breaking change id: 74 -->
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