Improved equality checks for cache objects

src/Discord.Net/Models/Channel.cs

@@ -207,6 +207,8 @@ namespace Discord
 			user.UpdateChannelPermissions(this);
 		}
 
+		public override bool Equals(object obj) => obj is Channel && (obj as Channel).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => Name ?? Id;
 	}
 }

src/Discord.Net/Models/Color.cs

@@ -77,5 +77,9 @@ namespace Discord
 			uint mask = (uint)~(0xFF << bit);
             _rawValue = (_rawValue & mask) | ((uint)value << bit);
 		}
+
+		public override bool Equals(object obj) => obj is Color && (obj as Color)._rawValue == _rawValue;
+		public override int GetHashCode() => _rawValue.GetHashCode();
+		public override string ToString() => '#' + _rawValue.ToString("X");
 	}
 }

src/Discord.Net/Models/GlobalUser.cs

@@ -69,6 +69,8 @@ namespace Discord
 				_client.GlobalUsers.TryRemove(Id);
 		}
 
+		public override bool Equals(object obj) => obj is GlobalUser && (obj as GlobalUser).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => Id;
 	}
 }

src/Discord.Net/Models/Invite.cs

@@ -112,6 +112,8 @@ namespace Discord
 				CreatedAt = model.CreatedAt.Value;
 		}
 
+		public override bool Equals(object obj) => obj is Invite && (obj as Invite).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => XkcdCode ?? Id;
 	}
 }

src/Discord.Net/Models/Message.cs

@@ -235,6 +235,8 @@ namespace Discord
 			}
 		}
 
+		public override bool Equals(object obj) => obj is Message && (obj as Message).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => $"{User}: {RawText}";
 	}
 }

src/Discord.Net/Models/Permissions.cs

@@ -137,6 +137,9 @@ namespace Discord
 			if (_isLocked)
 				throw new InvalidOperationException("Unable to edit cached permissions directly, use Copy() to make an editable copy.");
 		}
+
+		public override bool Equals(object obj) => obj is Permissions && (obj as Permissions)._rawValue == _rawValue;
+		public override int GetHashCode() => _rawValue.GetHashCode();
 	}
 
 	public sealed class DualChannelPermissions
@@ -214,5 +217,10 @@ namespace Discord
 				Deny.SetBit(pos, false);
 			}
 		}
+
+		public override bool Equals(object obj) => obj is DualChannelPermissions && 
+			(obj as DualChannelPermissions).Allow.Equals(Allow) &&
+			(obj as DualChannelPermissions).Deny.Equals(Deny);
+		public override int GetHashCode() => unchecked(Allow.GetHashCode() + Deny.GetHashCode());
 	}
 }

src/Discord.Net/Models/Role.cs

@@ -70,6 +70,8 @@ namespace Discord
 				member.UpdateServerPermissions();
 		}
 
+		public override bool Equals(object obj) => obj is Role && (obj as Role).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => Name ?? Id;
 	}
 }

src/Discord.Net/Models/Server.cs

@@ -252,6 +252,8 @@ namespace Discord
 			}
 		}
 
+		public override bool Equals(object obj) => obj is Server && (obj as Server).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => Name ?? Id;
 	}
 }

src/Discord.Net/Models/User.cs

@@ -370,6 +370,8 @@ namespace Discord
 			return _roles.ContainsKey(role.Id);
 		}
 
+		public override bool Equals(object obj) => obj is User && (obj as User).Id == Id;
+		public override int GetHashCode() => Id.GetHashCode();
 		public override string ToString() => Name ?? Id;
 	}
 }