Fixed comparing of CultureInfo in unit tests. (#8109)

Replaced Assert.Same with Assert.Equal for CultureInfo

Author: NikitaSemenovAkvelon

src/System.Windows.Forms/tests/UnitTests/System/Windows/Forms/ListControlTests.cs

@@ -1403,17 +1403,17 @@ public void ListControl_FormatInfo_Set_CallsRefreshItems()
 
             // Set different.
             control.FormatInfo = CultureInfo.CurrentCulture;
-            Assert.Same(CultureInfo.CurrentCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.CurrentCulture, control.FormatInfo);
             Assert.Equal(1, callCount);
 
             // Set same.
             control.FormatInfo = CultureInfo.CurrentCulture;
-            Assert.Same(CultureInfo.CurrentCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.CurrentCulture, control.FormatInfo);
             Assert.Equal(1, callCount);
 
             // Set different.
             control.FormatInfo = CultureInfo.InvariantCulture;
-            Assert.Same(CultureInfo.InvariantCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.InvariantCulture, control.FormatInfo);
             Assert.Equal(2, callCount);
 
             // Set null.
@@ -1437,17 +1437,17 @@ public void ListControl_FormatInfo_SetWithHandler_CallsOnFormatInfoChanged()
 
             // Set different.
             control.FormatInfo = CultureInfo.CurrentCulture;
-            Assert.Same(CultureInfo.CurrentCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.CurrentCulture, control.FormatInfo);
             Assert.Equal(1, callCount);
 
             // Set same.
             control.FormatInfo = CultureInfo.CurrentCulture;
-            Assert.Same(CultureInfo.CurrentCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.CurrentCulture, control.FormatInfo);
             Assert.Equal(1, callCount);
 
             // Set different.
             control.FormatInfo = CultureInfo.InvariantCulture;
-            Assert.Same(CultureInfo.InvariantCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.InvariantCulture, control.FormatInfo);
             Assert.Equal(2, callCount);
 
             // Set null.
@@ -1458,7 +1458,7 @@ public void ListControl_FormatInfo_SetWithHandler_CallsOnFormatInfoChanged()
             // Remove handler.
             control.FormatInfoChanged -= handler;
             control.FormatInfo = CultureInfo.CurrentCulture;
-            Assert.Same(CultureInfo.CurrentCulture, control.FormatInfo);
+            Assert.Equal(CultureInfo.CurrentCulture, control.FormatInfo);
             Assert.Equal(3, callCount);
         }