v5.3.0: Change SchemaDateRange.Start/End from string to DateTimeOffset (Issue #21)

BREAKING: SchemaDateRange.Start and .End are now DateTimeOffset instead
of string, matching DatasetRange for type consistency. Code that assigned
these to string variables will need `.ToString("o")` for ISO 8601 output.
Also adds Duration computed property and [JsonIgnore] on both DatasetRange
and SchemaDateRange Duration properties to prevent serialization leakage.

Author: Alparse

README.md

@@ -1,7 +1,7 @@
 # databento-dotnet
 
-[![NuGet](https://img.shields.io/badge/NuGet-v5.2.3-blue)](https://www.nuget.org/packages/Databento.Client)
-[![Downloads](https://img.shields.io/badge/Downloads-15.4K-blue)](https://www.nuget.org/packages/Databento.Client)
+[![NuGet](https://img.shields.io/badge/NuGet-v5.3.0-blue)](https://www.nuget.org/packages/Databento.Client)
+[![Downloads](https://img.shields.io/badge/Downloads-16.6K-blue)](https://www.nuget.org/packages/Databento.Client)
 [![.NET](https://img.shields.io/badge/.NET-8.0%20%7C%209.0-purple)](https://dotnet.microsoft.com/)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
 

src/Databento.Client/Databento.Client.csproj

@@ -9,7 +9,7 @@
 
     <!-- Package Information -->
     <PackageId>Databento.Client</PackageId>
-    <Version>5.2.3</Version>
+    <Version>5.3.0</Version>
     <Authors>Alparse</Authors>
     <Company>Databento</Company>
     <Product>databento-dotnet</Product>
@@ -20,7 +20,7 @@
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/Alparse/databento-dotnet</PackageProjectUrl>
     <PackageReadmeFile>README.md</PackageReadmeFile>
-    <PackageReleaseNotes>v5.2.3: Fix native DLLs built with debug configuration that required VCRUNTIME140D.dll/ucrtbased.dll (Issue #18)</PackageReleaseNotes>
+    <PackageReleaseNotes>v5.3.0: BREAKING — SchemaDateRange.Start and .End changed from string to DateTimeOffset for type consistency with DatasetRange (Issue #21). If you accessed these as strings, use .ToString("o") for equivalent output.</PackageReleaseNotes>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
 
     <!-- XML Documentation -->

src/Databento.Client/Models/Metadata/DatasetRange.cs

@@ -1,3 +1,5 @@
+using System.Text.Json.Serialization;
+
 namespace Databento.Client.Models.Metadata;
 
 /// <summary>
@@ -24,6 +26,7 @@ public class DatasetRange
     /// <summary>
     /// Duration of available data
     /// </summary>
+    [JsonIgnore]
     public TimeSpan Duration => End - Start;
 
     public override string ToString()

src/Databento.Client/Models/Metadata/SchemaDateRange.cs

@@ -1,3 +1,5 @@
+using System.Text.Json.Serialization;
+
 namespace Databento.Client.Models.Metadata;
 
 /// <summary>
@@ -6,17 +8,23 @@ namespace Databento.Client.Models.Metadata;
 public class SchemaDateRange
 {
     /// <summary>
-    /// Start timestamp (ISO 8601)
+    /// Start timestamp
+    /// </summary>
+    public DateTimeOffset Start { get; set; }
+
+    /// <summary>
+    /// End timestamp (exclusive)
     /// </summary>
-    public string Start { get; set; } = string.Empty;
+    public DateTimeOffset End { get; set; }
 
     /// <summary>
-    /// End timestamp (ISO 8601, exclusive)
+    /// Duration of available data for this schema
     /// </summary>
-    public string End { get; set; } = string.Empty;
+    [JsonIgnore]
+    public TimeSpan Duration => End - Start;
 
     public override string ToString()
     {
-        return $"{Start} to {End}";
+        return $"{Start:yyyy-MM-dd HH:mm:ss} to {End:yyyy-MM-dd HH:mm:ss}";
     }
 }