Encrypt and Decrypt a String in C# Using Asymmetric Encryption

There are two classes for asymmetric encryption in .net. RSACryptoServiceProvider and DSACryptoserviceProvider. Both classes automatically create the public and private keys necessary to encryption and decryption with the default constructor, respectively. Call the ExportParameters function on either class, which has a single boolean parameter to obtain the key. If true returns both public and private key

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void Main()
{

	var keySize=2048;
	var rsaCryptoServiceProvider = new RSACryptoServiceProvider(keySize);

	var cipherText = Encrypt("hello world", rsaCryptoServiceProvider.ExportParameters(false));
	var plainText = Decrypt(cipherText, rsaCryptoServiceProvider.ExportParameters(true));
	Console.WriteLine(plainText);

}
public string Encrypt(string data, RSAParameters key)
{

	using (var rsa = new RSACryptoServiceProvider())
	{
		rsa.ImportParameters(key);
		var byteData = Encoding.UTF8.GetBytes(data);
		var encryptData = rsa.Encrypt(byteData, false);
		return Convert.ToBase64String(encryptData);
	}
}

public string Decrypt(string cipherText, RSAParameters key)
{

	using (var rsa = new RSACryptoServiceProvider())
	{
		var cipherByteData = Convert.FromBase64String(cipherText);
		rsa.ImportParameters(key);

		var encryptData = rsa.Decrypt(cipherByteData, false);
		return Encoding.UTF8.GetString(encryptData);
	}
}