RDG007: No valid constructor found

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	Value
Rule ID	RDG007
Fix is breaking or non-breaking	Non-breaking

Cause

This diagnostic is emitted by the Request Delegate Generator when an endpoint contains a route handler with a parameter annotated with the [AsParameters] attribute with no valid constructor.

Rule description

Types that are used for surrogate binding via the AsParameters attribute must contain a public constructor. The TodoRequest type produces this diagnostic because there is no public constructor.

:::code language="csharp" source="~/../AspNetCore.Docs.Samples/fundamentals/aot/diagnostics/Rdg7/Program.cs" id="snippet_1" highlight="13-14,23-25":::

How to fix violations

Remove the non-public constructor, or add a new public constructor.

:::code language="csharp" source="~/../AspNetCore.Docs.Samples/fundamentals/aot/diagnostics/Rdg7/Program.cs" id="snippet_1f" highlight="13-15,18-22":::

When to suppress warnings

This warning can't be safely suppressed. When suppressed, results in the InvalidOperationException runtime exception.