DKIM.DkimSigner.DkimSigner C# (CSharp) Method

        public DkimSigner([NotNull]IPrivateKeySigner privateKeySigner, [NotNull]string domain, [NotNull]string selector, string[] headersToSign = null)
		{
			if (privateKeySigner == null)
			{
				throw new ArgumentNullException("privateKeySigner");
			}

			if (domain == null)
			{
				throw new ArgumentNullException("domain");
			}

			if (domain.Length == 0)
			{
				throw new ArgumentException("Cannot be empty.", "domain");
			}

			if (selector == null)
			{
				throw new ArgumentNullException("selector");
			}

			if(selector.Length == 0)
			{
				throw new ArgumentException("Cannot be empty.", "selector");
			}


			_privateKeySigner = privateKeySigner;
			_domain = domain;
			_selector = selector;
			_headersToSign = headersToSign ?? new string[]{"From"};

            if (_headersToSign.Length ==0)
            {
                _headersToSign = new string[] {"From"};
            }


            this.Encoding = Encoding.UTF8;

		}