VerifyData signed with "SHA256withRSA" algoritm always return false.

RSACryptoServiceProviderrsaCripto=(RSACryptoServiceProvider)certUserC.PublicKey.Key;

byte[]signedBytes=Convert.FromBase64String(SignedString)     

byte[]bytesToVerify=byteConverterUTF8.GetBytes(originalString);　               

RSACryptoServiceProviderp=newRSACryptoServiceProvider();

 p.FromXmlString(publicKey);

SHA256mySHA256=SHA256Managed.Create();

bool verified=p.VerifyData(bytesToVerify,mySHA256,signedBytes);