Implemented IEquatable for several classes.

SteamStorefrontAPI/Classes/appdetails/SteamApp.cs

@@ -10,7 +10,7 @@ using Newtonsoft.Json.Linq;
 
 namespace SteamStorefrontAPI.Classes
 {
-    public class SteamApp
+    public class SteamApp : IEquatable<SteamApp>
     {
         [JsonProperty("type")]
         public string Type { get; set; }
@@ -128,7 +128,8 @@ namespace SteamStorefrontAPI.Classes
             this.DLC = new List<int>();
         }
 
-        public static SteamApp FromJson(string json) {
+        public static SteamApp FromJson(string json)
+        {
 
             var serializerSettings = new JsonSerializerSettings
             {
@@ -141,5 +142,33 @@ namespace SteamStorefrontAPI.Classes
 
             return JsonConvert.DeserializeObject<SteamApp>(json, serializerSettings);
         }
+
+        public bool Equals(SteamApp other)
+        {
+            if (other == null)
+                return false;
+
+            if (this.SteamAppId == other.SteamAppId && this.Type == other.Type)
+                return true;
+            else
+                return false;
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            SteamApp personObj = obj as SteamApp;
+            if (personObj == null)
+                return false;
+            else
+                return Equals(personObj);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.SteamAppId.GetHashCode();
+        }
     }
 }

SteamStorefrontAPI/Classes/common/AppInfo.cs

@@ -11,7 +11,7 @@ namespace SteamStorefrontAPI.Classes
 {
     public enum ControllerSupport { Full, Partial };
 
-    public class AppInfo
+    public class AppInfo : IEquatable<AppInfo>
     {
         [JsonProperty("id")]
         public int Id { get; set; }
@@ -73,5 +73,33 @@ namespace SteamStorefrontAPI.Classes
 
         [JsonProperty("purchase_package", NullValueHandling = NullValueHandling.Ignore)]
         public string PurchasePackage { get; set; }
+
+        public bool Equals(AppInfo other)
+        {
+            if (other == null)
+                return false;
+
+            if (this.Id == other.Id && this.Type == other.Type)
+                return true;
+            else
+                return false;
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            AppInfo personObj = obj as AppInfo;
+            if (personObj == null)
+                return false;
+            else
+                return Equals(personObj);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.Id.GetHashCode();
+        }
     }
 }

SteamStorefrontAPI/Classes/common/PriceOverview.cs

@@ -9,7 +9,7 @@ using Newtonsoft.Json.Converters;
 
 namespace SteamStorefrontAPI.Classes
 {
-    public class PriceOverview
+    public class PriceOverview : IEquatable<PriceOverview>
     {
         [JsonProperty("currency")]
         public string Currency { get; set; }
@@ -28,5 +28,39 @@ namespace SteamStorefrontAPI.Classes
         [JsonProperty("individual", NullValueHandling = NullValueHandling.Ignore)]
         [JsonConverter(typeof(SteamPriceStringConverter))]
         public double Individual { get; set; }
+
+        public bool Equals(PriceOverview other)
+        {
+            if (other == null)
+                return false;
+
+            if (this.Final == other.Final
+                && this.Currency == other.Currency
+                && this.Initial == other.Initial)
+            {
+                return true;
+            }
+
+            return false;
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            PriceOverview personObj = obj as PriceOverview;
+            if (personObj == null)
+                return false;
+            else
+                return Equals(personObj);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.Final.GetHashCode() 
+                ^ this.Initial.GetHashCode() 
+                ^ this.Currency.GetHashCode();
+        }
     }
 }

SteamStorefrontAPI/Classes/featuredcategories/FeaturedCategory.cs

@@ -9,7 +9,7 @@ using Newtonsoft.Json.Converters;
 
 namespace SteamStorefrontAPI.Classes
 {
-    public class FeaturedCategory
+    public class FeaturedCategory : IEquatable<FeaturedCategory>
     {
         [JsonProperty("id")]
         public string Id { get; set; }
@@ -47,7 +47,33 @@ namespace SteamStorefrontAPI.Classes
 
             return JsonConvert.DeserializeObject<FeaturedCategory>(json, serializerSettings);
         }
+
+        public bool Equals(FeaturedCategory other)
+        {
+            if (other == null)
+                return false;
+
+            if (this.Id == other.Id)
+                return true;
+            else
+                return false;
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            FeaturedCategory personObj = obj as FeaturedCategory;
+            if (personObj == null)
+                return false;
+            else
+                return Equals(personObj);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.Id.GetHashCode();
+        }
     }
-
-
 }

SteamStorefrontAPI/Classes/packagedetails/PackageApp.cs

@@ -9,12 +9,40 @@ using Newtonsoft.Json.Converters;
 
 namespace SteamStorefrontAPI.Classes
 {
-    public partial class PackageApp
+    public partial class PackageApp : IEquatable<PackageApp>
     {
         [JsonProperty("id")]
         public int Id { get; set; }
 
         [JsonProperty("name")]
         public string Name { get; set; }
+
+        public bool Equals(PackageApp other)
+        {
+            if (other == null)
+                return false;
+
+            if (this.Id == other.Id)
+                return true;
+            else
+                return false;
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            PackageApp personObj = obj as PackageApp;
+            if (personObj == null)
+                return false;
+            else
+                return Equals(personObj);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.Id.GetHashCode();
+        }
     }
 }