Added a configurable run mode for commands

src/Discord.Net.Commands/Attributes/CommandAttribute.cs

@@ -6,6 +6,7 @@ namespace Discord.Commands
     public class CommandAttribute : Attribute
     {
         public string Text { get; }
+        public RunMode RunMode { get; set; } = RunMode.Sync;
 
         public CommandAttribute()
         {

src/Discord.Net.Commands/CommandInfo.cs

@@ -25,6 +25,7 @@ namespace Discord.Commands
         public string Text { get; }
         public int Priority { get; }
         public bool HasVarArgs { get; }
+        public RunMode RunMode { get; }
         public IReadOnlyList<string> Aliases { get; }
         public IReadOnlyList<CommandParameter> Parameters { get; }
         public IReadOnlyList<PreconditionAttribute> Preconditions { get; }
@@ -40,6 +41,7 @@ namespace Discord.Commands
 
                 if (attribute.Text == null)
                     Text = groupPrefix;
+                RunMode = attribute.RunMode;
 
                 if (groupPrefix != "")
                     groupPrefix += " ";
@@ -150,7 +152,19 @@ namespace Discord.Commands
         {
             try
             {
-                await _action.Invoke(context, GenerateArgs(argList, paramList)).ConfigureAwait(false);//Note: This code may need context
+                var args = GenerateArgs(argList, paramList);
+                switch (RunMode)
+                {
+                    case RunMode.Sync:
+                        await _action(context, args).ConfigureAwait(false);
+                        break;
+                    case RunMode.Async:
+                        var t1 = _action(context, args);
+                        break;
+                    case RunMode.FireAndForget:
+                        var t2 = Task.Run(() => _action(context, args));
+                        break;
+                }
                 return ExecuteResult.FromSuccess();
             }
             catch (Exception ex)

src/Discord.Net.Commands/RunMode.cs

@@ -0,0 +1,9 @@
+namespace Discord.Commands
+{
+    public enum RunMode
+    {
+        Sync,
+        Async,
+        FireAndForget
+    }
+}