ensure that StartInfo survives JSON roundtrip

src/StartInfo.cs

@@ -2,17 +2,23 @@
 
 using System.Collections.ObjectModel;
 using System.Diagnostics;
-
+using System.Text.Json.Serialization;
 using static PInvoke.Kernel32;
 
 partial class ProcessDetour {
     public sealed class StartInfo {
         public string Executable { get; }
-        public Collection<string> InjectDlls { get; } = new();
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
+        public Collection<string> InjectDlls { get; init; } = new();
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public string? WorkingDirectory { get; set; }
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public string? CommandLine { get; set; }
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public IDictionary<string, string>? Environment { get; set; }
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public CreateProcessFlags Flags { get; set; } = CreateProcessFlags.None;
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
         public ProcessWindowStyle WindowStyle { get; set; }
 
         public StartInfo(string executable) {

test/AsUser.cs

@@ -0,0 +1,19 @@
+namespace NDetours;
+
+using System.Text.Json;
+using static NDetours.ProcessDetour;
+
+public class AsUser {
+    [Fact]
+    public void StartInfoRoundtrip() {
+        var original = new StartInfo(@"C:\test.exe") {
+            InjectDlls = { "a.dll", "b.dll" },
+            WorkingDirectory = @"C:\",
+        };
+        string json = JsonSerializer.Serialize(original);
+        var startInfo = JsonSerializer.Deserialize<StartInfo>(json)!;
+        Assert.Equal(original.Executable, startInfo.Executable);
+        Assert.Equal(original.WorkingDirectory, startInfo.WorkingDirectory);
+        Assert.Equal(original.InjectDlls, startInfo.InjectDlls);
+    }
+}