diff --git a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/IPPacketInformation.cs b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/IPPacketInformation.cs
index 89d1081228978b..e4df5776b93e1b 100644
--- a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/IPPacketInformation.cs
+++ b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/IPPacketInformation.cs
@@ -42,10 +42,8 @@ public int Interface
             return !(packetInformation1 == packetInformation2);
         }
 
-        public override bool Equals(object comparand)
-        {
-            return comparand is IPPacketInformation && this == (IPPacketInformation)comparand;
-        }
+        public override bool Equals(object comparand) =>
+            comparand is IPPacketInformation other && this == other;
 
         public override int GetHashCode()
         {
diff --git a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/MulticastOption.cs b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/MulticastOption.cs
index 161c41249d286e..5f413cf06cfc0b 100644
--- a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/MulticastOption.cs
+++ b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/MulticastOption.cs
@@ -67,7 +67,7 @@ public IPAddress Group
             }
             set
             {
-                _group = value;
+                _group = value ?? throw new ArgumentNullException(nameof(value));
             }
         }
 
@@ -150,12 +150,7 @@ public IPAddress Group
             }
             set
             {
-                if (value == null)
-                {
-                    throw new ArgumentNullException(nameof(value));
-                }
-
-                _group = value;
+                _group = value ?? throw new ArgumentNullException(nameof(value));
             }
         }
 
diff --git a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/UdpReceiveResult.cs b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/UdpReceiveResult.cs
index 2e94a735933e08..02da108c787ef7 100644
--- a/src/libraries/System.Net.Sockets/src/System/Net/Sockets/UdpReceiveResult.cs
+++ b/src/libraries/System.Net.Sockets/src/System/Net/Sockets/UdpReceiveResult.cs
@@ -69,15 +69,8 @@ public override int GetHashCode()
         /// </summary>
         /// <param name="obj">The object to compare with this instance</param>
         /// <returns>true if obj is an instance of <see cref="UdpReceiveResult"/> and equals the value of the instance; otherwise, false</returns>
-        public override bool Equals(object obj)
-        {
-            if (!(obj is UdpReceiveResult))
-            {
-                return false;
-            }
-
-            return Equals((UdpReceiveResult)obj);
-        }
+        public override bool Equals(object obj) =>
+            obj is UdpReceiveResult other && Equals(other);
 
         /// <summary>
         /// Returns a value that indicates whether this instance is equal to a specified object
diff --git a/src/libraries/System.Net.Sockets/tests/FunctionalTests/MulticastOptionTest.cs b/src/libraries/System.Net.Sockets/tests/FunctionalTests/MulticastOptionTest.cs
index 6b712b21026ae3..456a2268e6c479 100644
--- a/src/libraries/System.Net.Sockets/tests/FunctionalTests/MulticastOptionTest.cs
+++ b/src/libraries/System.Net.Sockets/tests/FunctionalTests/MulticastOptionTest.cs
@@ -26,8 +26,7 @@ public void MulticastOption_Group_Roundtrips()
             var option = new MulticastOption(IPAddress.Any);
             Assert.Same(IPAddress.Any, option.Group);
 
-            option.Group = null;
-            Assert.Null(option.Group);
+            AssertExtensions.Throws<ArgumentNullException>("value", () => option.Group = null);
 
             option.Group = IPAddress.Broadcast;
             Assert.Same(IPAddress.Broadcast, option.Group);