kubernetes-client · k8s-ci-robot · Nov 19, 2025 · Nov 18, 2025 · Nov 18, 2025 · Nov 18, 2025
diff --git a/.github/workflows/buildtest.yaml b/.github/workflows/buildtest.yaml
@@ -17,6 +17,7 @@ jobs:
           dotnet-version: |
            8.0.x
            9.0.x
+           10.0.x
       - name: Build
         run: dotnet build --configuration Release 
       - name: Test
@@ -46,7 +47,7 @@ jobs:
       - name: Setup dotnet SDK
         uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '9.0.x'
+          dotnet-version: '10.0.x'
       - name: Restore nugets (msbuild)
         run: msbuild .\src\KubernetesClient\ -t:restore -p:RestorePackagesConfig=true
       - name: Build (msbuild)
@@ -64,6 +65,7 @@ jobs:
           dotnet-version: |
            8.0.x
            9.0.x
+           10.0.x
       - name: Minikube
         run: minikube start
       - name: Test

diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
@@ -36,6 +36,7 @@ jobs:
         dotnet-version: |
           8.0.x
           9.0.x
+          10.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

diff --git a/.github/workflows/docfx.yaml b/.github/workflows/docfx.yaml
@@ -35,6 +35,7 @@ jobs:
         dotnet-version: |
           8.0.x
           9.0.x
+          10.0.x
 
     - name: Build
       run: dotnet build -c Release

diff --git a/.github/workflows/draft.yaml b/.github/workflows/draft.yaml
@@ -23,6 +23,7 @@ jobs:
         dotnet-version: |
           8.0.x
           9.0.x
+          10.0.x
 
     - name: dotnet restore
       run: dotnet restore --verbosity minimal --configfile nuget.config

diff --git a/.github/workflows/nuget.yaml b/.github/workflows/nuget.yaml
@@ -20,6 +20,7 @@ jobs:
         dotnet-version: |
           8.0.x
           9.0.x
+          10.0.x
 
     - name: dotnet restore
       run: dotnet restore --verbosity minimal --configfile nuget.config

diff --git a/README.md b/README.md
@@ -154,7 +154,7 @@ ${GEN_DIR}/openapi/csharp.sh ${REPO_DIR}/src/KubernetesClient ${REPO_DIR}/csharp
 
 | SDK Version | Kubernetes Version | .NET Targeting                                      |
 |-------------|--------------------|-----------------------------------------------------|
-| 18.0        | 1.34               | net8.0;net9.0;net48*;netstandard2.0*                |
+| 18.0        | 1.34               | net8.0;net9.0;net10.0;net48*;netstandard2.0*        |
 | 17.0        | 1.33               | net8.0;net9.0;net48*;netstandard2.0*                |
 | 16.0        | 1.32               | net8.0;net9.0;net48*;netstandard2.0*                |
 | 15.0        | 1.31               | net6.0;net8.0;net48*;netstandard2.0*                |

diff --git a/src/KubernetesClient.Aot/KubernetesClient.Aot.csproj b/src/KubernetesClient.Aot/KubernetesClient.Aot.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
     <RootNamespace>k8s</RootNamespace>
     <PublishAot>true</PublishAot>
     <IsAotCompatible>true</IsAotCompatible>

diff --git a/src/KubernetesClient.Kubectl/KubernetesClient.Kubectl.csproj b/src/KubernetesClient.Kubectl/KubernetesClient.Kubectl.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>k8s.kubectl</RootNamespace>

diff --git a/src/KubernetesClient/KubernetesClient.csproj b/src/KubernetesClient/KubernetesClient.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
         <RootNamespace>k8s</RootNamespace>
         <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
     </PropertyGroup>

diff --git a/src/KubernetesClient/KubernetesJson.cs b/src/KubernetesClient/KubernetesJson.cs
@@ -24,7 +24,7 @@
            public override void Write(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options)
            {
                var iso8601TimeSpanString = XmlConvert.ToString(value); // XmlConvert for TimeSpan uses ISO8601, so delegate serialization to it
                writer.WriteStringValue(iso8601TimeSpanString);
            }
        }

@@ -60,12 +60,20 @@
                 // Output as RFC3339Micro
                 var date = value.ToUniversalTime();
 
-                var basePart = date.ToString("yyyy-MM-dd'T'HH:mm:ss", CultureInfo.InvariantCulture);
-                var frac = date.ToString(".ffffff", CultureInfo.InvariantCulture)
-                    .TrimEnd('0')
-                    .TrimEnd('.');
-
-                writer.WriteStringValue(basePart + frac + "Z");
+                // Check if there are any fractional seconds
+                var ticks = date.Ticks % TimeSpan.TicksPerSecond;
+                if (ticks == 0)
+                {
+                    // No fractional seconds - use format without fractional part
+                    var basePart = date.ToString("yyyy-MM-dd'T'HH:mm:ss", CultureInfo.InvariantCulture);
+                    writer.WriteStringValue(basePart + "Z");
+                }
+                else
+                {
+                    // Has fractional seconds - always use exactly 6 decimal places
+                    var formatted = date.ToString(RFC3339MicroFormat, CultureInfo.InvariantCulture);
+                    writer.WriteStringValue(formatted);
+                }
             }
         }
 
@@ -172,7 +180,7 @@
        public static string Serialize(object value, JsonSerializerOptions jsonSerializerOptions = null)
        {
 #if NET8_0_OR_GREATER
            var info = (jsonSerializerOptions ?? JsonSerializerOptions).GetTypeInfo(value.GetType());
            return JsonSerializer.Serialize(value, info);
 #else
            return JsonSerializer.Serialize(value, jsonSerializerOptions ?? JsonSerializerOptions);
@@ -182,7 +190,7 @@
        public static string Serialize(JsonDocument value, JsonSerializerOptions jsonSerializerOptions = null)
        {
 #if NET8_0_OR_GREATER
            var info = (jsonSerializerOptions ?? JsonSerializerOptions).GetTypeInfo(value.GetType());
            return JsonSerializer.Serialize(value, info);
 #else
            return JsonSerializer.Serialize(value, jsonSerializerOptions ?? JsonSerializerOptions);
@@ -202,7 +210,7 @@
        public static string Serialize(JsonNode value, JsonSerializerOptions jsonSerializerOptions = null)
        {
 #if NET8_0_OR_GREATER
            var info = (jsonSerializerOptions ?? JsonSerializerOptions).GetTypeInfo(value.GetType());
            return JsonSerializer.Serialize(value, info);
 #else
            return JsonSerializer.Serialize(value, jsonSerializerOptions ?? JsonSerializerOptions);

diff --git a/tests/E2E.Tests/E2E.Tests.csproj b/tests/E2E.Tests/E2E.Tests.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <IsPackable>false</IsPackable>
     <RootNamespace>k8s.E2E</RootNamespace>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/tests/Kubectl.Tests/Kubectl.Tests.csproj b/tests/Kubectl.Tests/Kubectl.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>

diff --git a/tests/KubernetesClient.Classic.Tests/KubernetesClient.Classic.Tests.csproj b/tests/KubernetesClient.Classic.Tests/KubernetesClient.Classic.Tests.csproj
@@ -2,8 +2,8 @@
   <PropertyGroup>
     <IsPackable>false</IsPackable>
     <RootNamespace>k8s.Tests</RootNamespace>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">net8.0;net9.0</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">net8.0;net9.0;net48</TargetFrameworks>
+    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">net8.0;net9.0;net10.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">net8.0;net9.0;net10.0;net48</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/tests/KubernetesClient.Tests/KubernetesClient.Tests.csproj b/tests/KubernetesClient.Tests/KubernetesClient.Tests.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <IsPackable>false</IsPackable>
     <RootNamespace>k8s.Tests</RootNamespace>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/tests/KubernetesClient.Tests/KubernetesJsonTests.cs b/tests/KubernetesClient.Tests/KubernetesJsonTests.cs
@@ -142,4 +142,31 @@ public void ReadWriteDatesJson()
 
         Assert.Equal(kManifest, jsonFromObj2);
     }
+
+    [Fact]
+    public void DateTimeWithFractionalSecondsAlwaysHasSixDigits()
+    {
+        // Test that datetime fields with fractional seconds always output exactly 6 decimal places
+        // This is required by Kubernetes API which expects RFC3339Micro format
+
+        // Create a datetime with 5 digits of precision (962170 microseconds = .96217 seconds)
+        var dt = new DateTime(2025, 11, 17, 22, 52, 34, 962, DateTimeKind.Utc).AddTicks(1700);
+
+        var secret = new V1Secret
+        {
+            Metadata = new V1ObjectMeta
+            {
+                Name = "test-secret",
+                CreationTimestamp = dt,
+            },
+        };
+
+        var json = KubernetesJson.Serialize(secret);
+
+        // Verify the datetime is serialized with exactly 6 decimal places
+        Assert.Contains("2025-11-17T22:52:34.962170Z", json);
+
+        // Also verify it doesn't have 5 digits (which would fail in Kubernetes)
+        Assert.DoesNotContain("2025-11-17T22:52:34.96217Z", json);
+    }
 }
-Original file line number
+Diff line change
@@ Expand Up / @@ -36,6 +36,7 @@ jobs: @@
             dotnet-version: |
 .0.x
 .0.x
+.0.x
         # Initializes the CodeQL tools for scanning.
         - name: Initialize CodeQL
@@ Expand Down @@