compare-datetime: update for .NET 10 rewrite

dotnet-datetime/CompareDateTimeInCSharp/CompareDateTimeInCSharp/CompareDateTimeInCSharp.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

dotnet-datetime/CompareDateTimeInCSharp/CompareDateTimeInCSharp/Examples.cs

@@ -8,25 +8,29 @@ public static bool IsDateInSameTimeZone()
             var secondDate = new DateTime(2021, 05, 06, 12, 0, 0, DateTimeKind.Utc);
             var firstDateAsUtc = firstDate.ToUniversalTime();
 
-            if (firstDateAsUtc.Equals(secondDate))
-            {
-                return true;
-            }
-
-            return false;
+            return firstDateAsUtc.Equals(secondDate);
         }
 
         public static bool IsDatePrecisionSame()
         {
             var firstDate = new DateTime(2021, 05, 06, 12, 0, 0);
             var secondDate = new DateTime(2021, 05, 06, 12, 0, 0, 500);
 
-            if (firstDate == secondDate)
-            {
-                return true;
-            }
+            return firstDate == secondDate;
+        }
+
+        public static (bool AreClose, bool SameDay, bool SameDayViaDateOnly) CompareWithTolerance()
+        {
+            var firstDate = new DateTime(2021, 05, 06, 12, 0, 0);
+            var secondDate = new DateTime(2021, 05, 06, 12, 0, 0, 500);
+
+            var tolerance = TimeSpan.FromMilliseconds(1);
+            var areClose = (firstDate - secondDate).Duration() <= tolerance;
+
+            var sameDay = firstDate.Date == secondDate.Date;
+            var sameDayViaDateOnly = DateOnly.FromDateTime(firstDate) == DateOnly.FromDateTime(secondDate);
 
-            return false;
+            return (areClose, sameDay, sameDayViaDateOnly);
         }
     }
 }

dotnet-datetime/CompareDateTimeInCSharp/CompareDateTimeInCSharp/Program.cs

@@ -46,6 +46,12 @@ static void Main(string[] args)
             {
                 Console.WriteLine("Date precisions are different.");
             }
+
+            // Comparing DateTime values with a tolerance, and comparing by date only
+            var (areClose, sameDay, sameDayViaDateOnly) = Examples.CompareWithTolerance();
+            Console.WriteLine($"Within 1ms tolerance: {areClose}");
+            Console.WriteLine($"Same day (Date property): {sameDay}");
+            Console.WriteLine($"Same day (DateOnly): {sameDayViaDateOnly}");
         }
 
         private static void ShowResult(DateTime firstDate, DateTime secondDate, int result)

dotnet-datetime/CompareDateTimeInCSharp/Tests/Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>