diff --git a/README.md b/README.md
index c3b75df..8d92434 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Version 4.0.1 contains breaking changes.
 - Removed obsolete methods.
 - Methods are now asynchronous. (The return value changed from `void` to `Task` and gains `Async` suffix)
 - Events are now asynchronous (return value changed from `void` to `Task`)
-- `Add/RemoveChatCommandIdentifier` methods were removed, use `ChatCommandIdentifiers` property instead (same applies to whisper);
+- `Add/RemoveChatCommandIdentifier` methods were removed, use `ChatCommandIdentifiers` property instead (same applies to whisper) and uses `string` instead of `char`
 - `OnLog` event was removed (you can still use `ILoggerFactory` to get logs)
 - removed builders classes (removed `TwitchLib.Client.Models.Builders namespace`)
 - changed public fields to properties
diff --git a/TwitchLib.Client.Example/Program.cs b/TwitchLib.Client.Example/Program.cs
index 435aa81..3ad0153 100644
--- a/TwitchLib.Client.Example/Program.cs
+++ b/TwitchLib.Client.Example/Program.cs
@@ -11,7 +11,7 @@
 var credentials = new ConnectionCredentials(); // anonymous user, add Username and OAuth token to get the ability to send messages
 var client = new TwitchClient(loggerFactory: loggerFactory)
 {
-    ChatCommandIdentifiers = { '!', '?' }, // you can customize the command identifiers, if not set, defaults to '!'
+    ChatCommandIdentifiers = { "!", "?" }, // you can customize the command identifiers, if not set, defaults to '!'
 };
 
 client.Initialize(credentials);
diff --git a/TwitchLib.Client.Models/CommandInfo.cs b/TwitchLib.Client.Models/CommandInfo.cs
index d3f55a5..889664f 100644
--- a/TwitchLib.Client.Models/CommandInfo.cs
+++ b/TwitchLib.Client.Models/CommandInfo.cs
@@ -6,7 +6,7 @@ namespace TwitchLib.Client.Models;
 public class CommandInfo
 {
     /// <summary>Property representing the command identifier (ie command prefix).</summary>
-    public char Identifier { get; }
+    public string Identifier { get; }
 
     /// <summary>Property representing the actual command (without the command prefix).</summary>
     public string Name { get; }
@@ -20,13 +20,13 @@ public class CommandInfo
     /// <summary>
     /// Initializes a new instance of the <see cref="CommandInfo"/> class.
     /// </summary>
-    public CommandInfo(char identifier, string name) : this(identifier, name, string.Empty, new())
+    public CommandInfo(string identifier, string name) : this(identifier, name, string.Empty, new())
     { }
 
     /// <summary>
     /// Initializes a new instance of the <see cref="CommandInfo"/> class.
     /// </summary>
-    public CommandInfo(char identifier, string name, string argumentsAsString, List<string> argumentsAsList)
+    public CommandInfo(string identifier, string name, string argumentsAsString, List<string> argumentsAsList)
     {
         Identifier = identifier;
         Name = name;
@@ -35,37 +35,34 @@ public CommandInfo(char identifier, string name, string argumentsAsString, List<
     }
 
     /// <summary>
-    /// Tries to parse a span of characters into a value.
+    /// Tries to parse a message with specified command identifier into a value.
     /// </summary>
-    /// <param name="s">The span of characters to parse.</param>
-    /// <param name="result">When this method returns, contains the result of successfully parsing s, or an undefined value on failure.</param>
     /// <returns>true if s was successfully parsed; otherwise, false.</returns>
 #if NETSTANDARD2_0
-    public static bool TryParse(ReadOnlySpan<char> s, out CommandInfo result)
+    internal static bool TryParse(string commandIdentifier, ReadOnlySpan<char> message, out CommandInfo result)
 #else
-    public static bool TryParse(ReadOnlySpan<char> s, [MaybeNullWhen(false)] out CommandInfo result)
+    internal static bool TryParse(string commandIdentifier, ReadOnlySpan<char> message, [MaybeNullWhen(false)] out CommandInfo result)
 #endif
     {
         result = default!;
-        s = s.Trim();
-        if (s.IsEmpty)
+        if(!message.StartsWith(commandIdentifier.AsSpan()))
             return false;
-        var commandIdentifier = s[0];
-        s = s.Slice(1);
-        if (s.IsEmpty || s[0] == ' ') // if string contains only the identifier or the first char after identifier is space, then it is invalid input
+
+        message = message.Slice(commandIdentifier.Length);
+        if (message.IsEmpty || message[0] == ' ') // if string contains only the identifier or the first char after identifier is space, then it is invalid input
             return false;
-        var indexOfSpace = s.IndexOf(' ');
+        var indexOfSpace = message.IndexOf(' ');
         if (indexOfSpace == -1)
         {
-            var name = s.ToString();
+            var name = message.ToString();
             result = new(commandIdentifier, name);
         }
         else
         {
-            var name = s.Slice(0, indexOfSpace).ToString();
-            s = s.Slice(indexOfSpace + 1).TrimStart();
-            var argumentsAsString = s.ToString();
-            result = new(commandIdentifier, name, argumentsAsString, ParseArgumentsToList(s));
+            var name = message.Slice(0, indexOfSpace).ToString();
+            message = message.Slice(indexOfSpace + 1).TrimStart();
+            var argumentsAsString = message.ToString();
+            result = new(commandIdentifier, name, argumentsAsString, ParseArgumentsToList(message));
         }
         return true;
 
diff --git a/TwitchLib.Client.Test/CommandInfoTest.cs b/TwitchLib.Client.Test/CommandInfoTest.cs
index c8fc735..d7571f6 100644
--- a/TwitchLib.Client.Test/CommandInfoTest.cs
+++ b/TwitchLib.Client.Test/CommandInfoTest.cs
@@ -6,12 +6,30 @@ namespace TwitchLib.Client.Test;
 public class CommandInfoTest
 {
     [Theory]
-    [InlineData("")]
-    [InlineData("!")]
-    [InlineData("! command")]
-    public void ParsingFailAndReturnNull(string s)
+    [InlineData("", "")]
+    [InlineData("!", "!")]
+    [InlineData("!", "! command")]
+    [InlineData("?", "!command")]
+    public void ParsingFailAndReturnNull(string commandIdentifier, string message)
     {
-        Assert.False(CommandInfo.TryParse(s, out var commandInfo));
+        Assert.False(CommandInfo.TryParse(commandIdentifier, message, out var commandInfo));
         Assert.Null(commandInfo);
     }
+
+    [Theory]
+    [InlineData("!", "!command", 0)]
+    [InlineData("!", "!command arg1", 1)]
+    [InlineData("!", "!command arg1 arg2", 2)]
+    [InlineData("!", "!command arg1 arg2 arg3 arg4", 4)]
+    [InlineData("!", "!command \"arg1 with space\"", 1)]
+    [InlineData("!", "!command \"arg1 with space\" \"arg2 with space\"", 2)]
+    [InlineData("cmd!", "cmd!command", 0)]
+    [InlineData("cmd!", "cmd!command arg1", 1)]
+    [InlineData("cmd!", "cmd!command \"arg1 with space\" \"arg2 with space\"", 2)]
+    public void Parsing(string commandIdentifier, string message, int argCount)
+    {
+        Assert.True(CommandInfo.TryParse(commandIdentifier, message, out var commandInfo));
+        Assert.NotNull(commandInfo);
+        Assert.Equal(argCount, commandInfo.ArgumentsAsList.Count);
+    }
 }
diff --git a/TwitchLib.Client/Interfaces/ITwitchClient.cs b/TwitchLib.Client/Interfaces/ITwitchClient.cs
index 67b049c..b9ee319 100644
--- a/TwitchLib.Client/Interfaces/ITwitchClient.cs
+++ b/TwitchLib.Client/Interfaces/ITwitchClient.cs
@@ -57,11 +57,11 @@ public interface ITwitchClient
         /// <summary>
         /// The chat command identifiers
         /// </summary>
-        ICollection<char> ChatCommandIdentifiers { get; }
+        ICollection<string> ChatCommandIdentifiers { get; }
         /// <summary>
         /// The whisper command identifiers
         /// </summary>
-        ICollection<char> WhisperCommandIdentifiers { get; }
+        ICollection<string> WhisperCommandIdentifiers { get; }
 
         /// <summary>
         /// Fires when an Announcement is received
diff --git a/TwitchLib.Client/TwitchClient.cs b/TwitchLib.Client/TwitchClient.cs
index 993fcac..b8f3cc2 100644
--- a/TwitchLib.Client/TwitchClient.cs
+++ b/TwitchLib.Client/TwitchClient.cs
@@ -89,10 +89,10 @@ public class TwitchClient : ITwitchClient
 
         #region Public Variables
         /// <inheritdoc/>
-        public ICollection<char> ChatCommandIdentifiers { get; } = new HashSet<char>();
+        public ICollection<string> ChatCommandIdentifiers { get; } = new HashSet<string>();
 
         /// <inheritdoc/>
-        public ICollection<char> WhisperCommandIdentifiers { get; } = new HashSet<char>();
+        public ICollection<string> WhisperCommandIdentifiers { get; } = new HashSet<string>();
 
         /// <inheritdoc/>
 #if NET
@@ -370,9 +370,9 @@ private void InitializationHelper(
             ConnectionCredentials = credentials;
 
             if (ChatCommandIdentifiers.Count == 0)
-                ChatCommandIdentifiers.Add('!');
+                ChatCommandIdentifiers.Add("!");
             if (WhisperCommandIdentifiers.Count == 0)
-                WhisperCommandIdentifiers.Add('!');
+                WhisperCommandIdentifiers.Add("!");
 
             for (var i = 0; i < channels.Count; i++)
             {
@@ -898,13 +898,10 @@ private async Task HandlePrivMsg(IrcMessage ircMessage)
                 await OnUserIntro.Invoke(this, new(chatMessage));
             }
 
-            if (OnChatCommandReceived is not null
-                && !string.IsNullOrEmpty(chatMessage.Message)
-                && ChatCommandIdentifiers.Contains(chatMessage.Message[0])
-                && CommandInfo.TryParse(chatMessage.Message.AsSpan(), out var commandInfo)
-                )
+            if (OnChatCommandReceived is not null 
+                && CanInvokeCommand(ChatCommandIdentifiers, chatMessage.Message.AsSpan(), out var commandInfo))
             {
-                await OnChatCommandReceived.Invoke(this, new(chatMessage, commandInfo));
+                await OnChatCommandReceived.Invoke(this, new(chatMessage, commandInfo!));
             }
 
         }
@@ -1101,16 +1098,29 @@ private async Task HandleWhisper(IrcMessage ircMessage)
 
             await OnWhisperReceived.TryInvoke(this, new(whisperMessage));
 
-            if (OnWhisperCommandReceived is not null
-                && !string.IsNullOrEmpty(whisperMessage.Message)
-                && WhisperCommandIdentifiers.Contains(whisperMessage.Message[0])
-                && CommandInfo.TryParse(whisperMessage.Message.AsSpan(), out var commandInfo)
-                )
+            if (OnWhisperCommandReceived is not null 
+                && CanInvokeCommand(WhisperCommandIdentifiers, whisperMessage.Message.AsSpan(), out var commandInfo))
             {
-                await OnWhisperCommandReceived.Invoke(this, new(whisperMessage, commandInfo));
+                await OnWhisperCommandReceived.Invoke(this, new(whisperMessage, commandInfo!));
             }
         }
 
+        static bool CanInvokeCommand(ICollection<string> commandIdentifiers, ReadOnlySpan<char> message, out CommandInfo? commandInfo)
+        {
+            commandInfo = null;
+            if (message.IsEmpty)
+                return false;
+
+            foreach (var commandIdentifier in commandIdentifiers)
+            {
+                if (message.StartsWith(commandIdentifier.AsSpan()))
+                {
+                    return CommandInfo.TryParse(commandIdentifier, message, out commandInfo);
+                }
+            }
+            return false;
+        }
+
         /// <summary>
         /// Handles the state of the room.
         /// </summary>
@@ -1169,9 +1179,9 @@ private static Task HandleCap(IrcMessage _)
             return Task.CompletedTask;
         }
 
-        #endregion
+#endregion
 
-        #endregion
+#endregion
 
         private Task UnaccountedFor(string ircString)
         {