@@ -1,4 +1,4 @@
-namespace MASA.BuildingBlocks.DDD.Domain.Entities;
+namespace MASA.BuildingBlocks.DDD.Domain.Entities;
 
 public abstract class Entity : IEntity, IEquatable<Entity>, IEquatable<object>
 {
@@ -50,7 +50,7 @@ public override int GetHashCode()
 
     public static bool operator !=(Entity? x, Entity? y)
     {
-        if (x is null ^ y is null) return false;
+        if (x is null ^ y is null) return true;
 
         if (x is null) return false;
 
@@ -66,4 +66,4 @@ public class Entity<TKey> : Entity, IEntity<TKey>
     {
         yield return ("Id", Id!);
     }
-}
+}
@@ -6,27 +6,27 @@ public class TestEntity
     [TestMethod]
     public void TestToString()
     {
-        MasaEntity entity = new() {Id = Guid.Empty};
+        MasaEntity entity = new() { Id = Guid.Empty };
         Assert.AreEqual("MasaEntity:Id=00000000-0000-0000-0000-000000000000", entity.ToString());
     }
 
     [TestMethod]
     public void TestEquals()
     {
         var id = Guid.NewGuid();
-        MasaEntity x = new() {Id = id};
-        MasaEntity y = new() {Id = id};
+        MasaEntity x = new() { Id = id };
+        MasaEntity y = new() { Id = id };
 
         Assert.IsTrue(x.Equals(y));
-        Assert.IsTrue(x.Equals((object) y));
+        Assert.IsTrue(x.Equals((object)y));
     }
 
     [TestMethod]
     public void TestGetHashCode()
     {
         var id = Guid.NewGuid();
-        MasaEntity x = new() {Id = id};
-        MasaEntity y = new() {Id = id};
+        MasaEntity x = new() { Id = id };
+        MasaEntity y = new() { Id = id };
 
         Assert.AreEqual(x.GetHashCode(), y.GetHashCode());
     }
@@ -35,9 +35,9 @@ public void TestGetHashCode()
     public void TestOperator()
     {
         var id = Guid.NewGuid();
-        MasaEntity x = new() {Id = id};
-        MasaEntity y = new() {Id = id};
-        MasaEntity z = new() {Id = Guid.NewGuid()};
+        MasaEntity x = new() { Id = id };
+        MasaEntity y = new() { Id = id };
+        MasaEntity z = new() { Id = Guid.NewGuid() };
 
         Assert.IsTrue(x == y);
         Assert.IsTrue(x != z);
@@ -47,9 +47,11 @@ public void TestOperator()
         Assert.IsTrue(null == m);
         Assert.IsFalse(null != m);
         Assert.IsFalse(m != null);
+        Assert.IsTrue(x != null);
+        Assert.IsTrue(null != x);
     }
 
     public class MasaEntity : Entity<Guid>
     {
     }
-}
+}
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-namespace MASA.BuildingBlocks.DDD.Domain.Entities;`
	`1`	`+namespace MASA.BuildingBlocks.DDD.Domain.Entities;`
`2`	`2`
`3`	`3`	`public abstract class Entity : IEntity, IEquatable<Entity>, IEquatable<object>`
`4`	`4`	`{`
`@@ -50,7 +50,7 @@ public override int GetHashCode()`
`50`	`50`
`51`	`51`	`public static bool operator !=(Entity? x, Entity? y)`
`52`	`52`	`{`
`53`		`- if (x is null ^ y is null) return false;`
	`53`	`+ if (x is null ^ y is null) return true;`
`54`	`54`
`55`	`55`	`if (x is null) return false;`
`56`	`56`
`@@ -66,4 +66,4 @@ public class Entity<TKey> : Entity, IEntity<TKey>`
`66`	`66`	`{`
`67`	`67`	`yield return ("Id", Id!);`
`68`	`68`	`}`
`69`		`-}`
	`69`	`+}`
Original file line number	Diff line number	Diff line change
`@@ -6,27 +6,27 @@ public class TestEntity`
`6`	`6`	`[TestMethod]`
`7`	`7`	`public void TestToString()`
`8`	`8`	`{`
`9`		`- MasaEntity entity = new() {Id = Guid.Empty};`
	`9`	`+ MasaEntity entity = new() { Id = Guid.Empty };`
`10`	`10`	`Assert.AreEqual("MasaEntity:Id=00000000-0000-0000-0000-000000000000", entity.ToString());`
`11`	`11`	`}`
`12`	`12`
`13`	`13`	`[TestMethod]`
`14`	`14`	`public void TestEquals()`
`15`	`15`	`{`
`16`	`16`	`var id = Guid.NewGuid();`
`17`		`- MasaEntity x = new() {Id = id};`
`18`		`- MasaEntity y = new() {Id = id};`
	`17`	`+ MasaEntity x = new() { Id = id };`
	`18`	`+ MasaEntity y = new() { Id = id };`
`19`	`19`
`20`	`20`	`Assert.IsTrue(x.Equals(y));`
`21`		`- Assert.IsTrue(x.Equals((object) y));`
	`21`	`+ Assert.IsTrue(x.Equals((object)y));`
`22`	`22`	`}`
`23`	`23`
`24`	`24`	`[TestMethod]`
`25`	`25`	`public void TestGetHashCode()`
`26`	`26`	`{`
`27`	`27`	`var id = Guid.NewGuid();`
`28`		`- MasaEntity x = new() {Id = id};`
`29`		`- MasaEntity y = new() {Id = id};`
	`28`	`+ MasaEntity x = new() { Id = id };`
	`29`	`+ MasaEntity y = new() { Id = id };`
`30`	`30`
`31`	`31`	`Assert.AreEqual(x.GetHashCode(), y.GetHashCode());`
`32`	`32`	`}`
`@@ -35,9 +35,9 @@ public void TestGetHashCode()`
`35`	`35`	`public void TestOperator()`
`36`	`36`	`{`
`37`	`37`	`var id = Guid.NewGuid();`
`38`		`- MasaEntity x = new() {Id = id};`
`39`		`- MasaEntity y = new() {Id = id};`
`40`		`- MasaEntity z = new() {Id = Guid.NewGuid()};`
	`38`	`+ MasaEntity x = new() { Id = id };`
	`39`	`+ MasaEntity y = new() { Id = id };`
	`40`	`+ MasaEntity z = new() { Id = Guid.NewGuid() };`
`41`	`41`
`42`	`42`	`Assert.IsTrue(x == y);`
`43`	`43`	`Assert.IsTrue(x != z);`
`@@ -47,9 +47,11 @@ public void TestOperator()`
`47`	`47`	`Assert.IsTrue(null == m);`
`48`	`48`	`Assert.IsFalse(null != m);`
`49`	`49`	`Assert.IsFalse(m != null);`
	`50`	`+ Assert.IsTrue(x != null);`
	`51`	`+ Assert.IsTrue(null != x);`
`50`	`52`	`}`
`51`	`53`
`52`	`54`	`public class MasaEntity : Entity<Guid>`
`53`	`55`	`{`
`54`	`56`	`}`
`55`		`-}`
	`57`	`+}`