Add CultureInfo.InvariantCulture to floating point number formatting (#1541)

* Add CultureInfo.InvariantCulture to floating point number formatting

* Remove unused using statement in KubernetesYamlTests.cs

tests/KubernetesClient.Tests/KubernetesYamlTests.cs

@@ -1,6 +1,7 @@
 using k8s.Models;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Text;
 using System.Threading.Tasks;
@@ -1095,5 +1096,21 @@ spec:
             Assert.Equal("v1beta2", crd.Spec.Versions[0].Name);
             Assert.Equal("v1", crd.Spec.Versions[1].Name);
         }
+
+        [Fact]
+        public void NoGlobalization()
+        {
+            var old = CultureInfo.CurrentCulture;
+            try
+            {
+                CultureInfo.CurrentCulture = CultureInfo.CreateSpecificCulture("fr-fr");
+                var yaml = KubernetesYaml.Serialize(new Dictionary<string, double>() { ["hello"] = 10.01 });
+                Assert.Equal("hello: 10.01", yaml);
+            }
+            finally
+            {
+                CultureInfo.CurrentCulture = old;
+            }
+        }
     }
 }