Prevent duplicate package reporting

src/Sentry/Package.cs

@@ -1,3 +1,5 @@
+using System;
+using System.Collections.Generic;
 using System.Text.Json;
 using Sentry.Internal.Extensions;
 
@@ -57,5 +59,28 @@ public static Package FromJson(JsonElement json)
 
             return new Package(name, version);
         }
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return (Name.GetHashCode() * 397) ^ Version.GetHashCode();
+            }
+        }
+
+        public override bool Equals(object? obj)
+        {
+            if (ReferenceEquals(this, obj))
+            {
+                return true;
+            }
+
+            if (obj is Package package)
+            {
+                return Name == package.Name && Version == package.Version;
+            }
+
+            return false;
+        }
     }
 }

src/Sentry/SdkVersion.cs

@@ -66,7 +66,7 @@ public void WriteTo(Utf8JsonWriter writer)
         {
             writer.WriteStartObject();
 
-            writer.WriteArrayIfNotEmpty("packages", InternalPackages);
+            writer.WriteArrayIfNotEmpty("packages", InternalPackages.Distinct());
             writer.WriteStringIfNotWhiteSpace("name", Name);
             writer.WriteStringIfNotWhiteSpace("version", Version);
 

test/Sentry.Tests/Protocol/SdkVersionTests.cs

@@ -57,5 +57,26 @@ public static IEnumerable<object[]> TestCases()
             sdk.AddPackage("a", "1");
             yield return new object[] { (sdk, "{\"packages\":[{\"name\":\"a\",\"version\":\"1\"},{\"name\":\"b\",\"version\":\"2\"}]}") };
         }
+
+        [Fact]
+        public void SerializeObject_IgnoresDuplicatePackages()
+        {
+            var sdkVersion = new SdkVersion
+            {
+                Name = "Sentry.Test.SDK",
+                Version = "3.9.2"
+            };
+            sdkVersion.AddPackage("nuget:Sentry.Extensions.Logging", "3.9.2");
+            sdkVersion.AddPackage("nuget:Sentry", "3.9.2");
+            sdkVersion.AddPackage("nuget:Sentry.Extensions.Logging", "3.9.2");
+            sdkVersion.AddPackage("nuget:Sentry", "3.9.2");
+            var actual = sdkVersion.ToJsonString();
+            Assert.Equal(
+                "{\"packages\":[{\"name\":\"nuget:Sentry.Extensions.Logging\",\"version\":\"3.9.2\"},{\"name\":\"nuget:Sentry\",\"version\":\"3.9.2\"}]," +
+                "\"name\":\"Sentry.Test.SDK\"," +
+                "\"version\":\"3.9.2\"}",
+                actual);
+
+        }
     }
 }