<PackageReference Include="Polly" Version="8.5.0" />

IFallbackPolicy<TResult>

public interface IFallbackPolicy<TResult> : IFallbackPolicy, IsPolicy
Defines properties and methods common to all Fallback policies generic-typed for executions returning results of type TResult.
using System.Runtime.CompilerServices; namespace Polly.Fallback { public interface IFallbackPolicy<[System.Runtime.CompilerServices.Nullable(2)] TResult> : IFallbackPolicy, IsPolicy { } }