private Func <KeyedHashAlgorithm> GetValidationAlgorithmFactory() { return(GetGenericAlgorithmFactory <KeyedHashAlgorithm>( configAttributeName: "validation", configAttributeValue: _machineKeySection.GetValidationAttributeSkipValidation(), switchStatement: algorithmName => { switch (algorithmName) { case "SHA1": return CryptoAlgorithms.CreateHMACSHA1; case "HMACSHA256": return CryptoAlgorithms.CreateHMACSHA256; case "HMACSHA384": return CryptoAlgorithms.CreateHMACSHA384; case "HMACSHA512": return CryptoAlgorithms.CreateHMACSHA512; default: return null; // unknown } }, errorResourceString: SR.Wrong_validation_enum_FX45)); }