Change result types from struct to class

src/Discord.Net.Commands/Results/ExecuteResult.cs

@@ -4,7 +4,7 @@ using System.Diagnostics;
 namespace Discord.Commands
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public struct ExecuteResult : IResult
+    public class ExecuteResult : IResult
     {
         public Exception Exception { get; }
 

src/Discord.Net.Commands/Results/ParseResult.cs

@@ -4,7 +4,7 @@ using System.Diagnostics;
 namespace Discord.Commands
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public struct ParseResult : IResult
+    public class ParseResult : IResult
     {
         public IReadOnlyList<TypeReaderResult> ArgValues { get; }
         public IReadOnlyList<TypeReaderResult> ParamValues { get; }

src/Discord.Net.Commands/Results/PreconditionResult.cs

@@ -3,7 +3,7 @@
 namespace Discord.Commands
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public struct PreconditionResult : IResult
+    public class PreconditionResult : IResult
     {
         public CommandError? Error { get; }
         public string ErrorReason { get; }

src/Discord.Net.Commands/Results/SearchResult.cs

@@ -4,7 +4,7 @@ using System.Diagnostics;
 namespace Discord.Commands
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public struct SearchResult : IResult
+    public class SearchResult : IResult
     {
         public string Text { get; }
         public IReadOnlyList<CommandMatch> Commands { get; }

src/Discord.Net.Commands/Results/TypeReaderResult.cs

@@ -6,7 +6,7 @@ using System.Diagnostics;
 namespace Discord.Commands
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public struct TypeReaderValue
+    public class TypeReaderValue
     {
         public object Value { get; }
         public float Score { get; }