Steven Giesel • 4/26/2026

ConfigurationIgnoreAttribute in .NET 11

This article introduces the ConfigurationIgnoreAttribute in .NET 11, a new feature in Microsoft.Extensions.Configuration that allows developers to mark properties in options classes as ignored by the configuration binder. Previously, workarounds like using ConfigurationKeyNameAttribute with garbage keys were needed. The attribute solves common scenarios like post-processed properties or parsed representations of raw values. It also clarifies that JsonIgnoreAttribute does not affect configuration binding. A practical example with CsvIngestionOptions demonstrates usage.

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#Dotnet #Net 11 #Configurationignoreattribute