namespace Microsoft.Extensions.Options { public class AsyncValidateOptions<TOptions> : IAsyncValidateOptions<TOptions>, IValidateOptions<TOptions>, IOptionsValidatorNameMetadata where TOptions : class { public string Name { get; } public Func<TOptions, CancellationToken, Task<bool>> Validation { get; } public string FailureMessage { get; } public AsyncValidateOptions(string name, Func<TOptions, CancellationToken, Task<bool>> validation, string failureMessage); public ValidateOptionsResult Validate(string name, TOptions options); public Task<ValidateOptionsResult> ValidateAsync(string name, TOptions options, CancellationToken cancellationToken = default(CancellationToken)); } }