Corrected clientID as well

Author: david-driscoll

src/Dap.Client/DebugAdapterClientOptions.cs

@@ -7,6 +7,7 @@
 using OmniSharp.Extensions.DebugAdapter.Protocol.Client;
 using OmniSharp.Extensions.DebugAdapter.Protocol.Models;
 using OmniSharp.Extensions.DebugAdapter.Protocol.Requests;
+using OmniSharp.Extensions.DebugAdapter.Protocol.Serialization;
 using OmniSharp.Extensions.DebugAdapter.Shared;
 using OmniSharp.Extensions.JsonRpc;
 
@@ -22,8 +23,6 @@ public DebugAdapterClientOptions()
 
         public string? ClientId { get; set; }
         public string? ClientName { get; set; }
-
-        [JsonProperty("adapterID")]
         public string AdapterId { get; set; } = null!;
         public string? Locale { get; set; }
         public bool LinesStartAt1 { get; set; }

src/Dap.Protocol/Feature/Requests/InitializeRequestFeature.cs

@@ -23,7 +23,7 @@ public record InitializeRequestArguments : IRequest<InitializeResponse>, IInitia
             /// The ID of the(frontend) client using this adapter.
             /// </summary>
 
-            [Optional]
+            [Optional, JsonProperty("clientID")]
             public string? ClientId { get; set; }
 
             /// <summary>

src/Dap.Protocol/Requests/IInitializeRequestArguments.cs

@@ -9,7 +9,7 @@ public interface IInitializeRequestArguments
         /// <summary>
         /// The ID of the(frontend) client using this adapter.
         /// </summary>
-        [Optional]
+        [Optional, JsonProperty("clientID")]
         string? ClientId { get; set; }
 
         /// <summary>