Fix sendgrid#425: Implement IEquatable for EmailAddress

src/SendGrid/Helpers/Mail/Model/EmailAddress.cs

@@ -3,6 +3,9 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 // </copyright>
 
+using System;
+
+
 namespace SendGrid.Helpers.Mail
 {
  using Newtonsoft.Json;
@@ -11,7 +14,7 @@ namespace SendGrid.Helpers.Mail
  /// An email object containing the email address and name of the sender or recipient.
  /// </summary>
  [JsonObject(IsReference = false)]
- public class EmailAddress
+ public class EmailAddress : IEquatable<EmailAddress>
  {
  /// <summary>
  /// Initializes a new instance of the <see cref="EmailAddress"/> class.
@@ -42,5 +45,23 @@ public EmailAddress(string email, string name = null)
  /// </summary>
  [JsonProperty(PropertyName = "email")]
  public string Email { get; set; }
+
+ public bool Equals(EmailAddress other) {
+ if(ReferenceEquals(null, other)) return false;
+ if(ReferenceEquals(this, other)) return true;
+ if(Email==null || other.Email==null) return false;
+ return string.Equals(Email.ToLowerInvariant(), other.Email.ToLowerInvariant());
+ }
+
+ public override bool Equals(object obj) {
+ if(ReferenceEquals(null, obj)) return false;
+ if(ReferenceEquals(this, obj)) return true;
+ if(obj.GetType()!=GetType()) return false;
+ return Equals((EmailAddress)obj);
+ }
+
+ public override int GetHashCode() {
+ return (Email!=null ? Email.ToLowerInvariant().GetHashCode() : 0);
+ }
  }
 }