many fixes

ChatBot/Common/Results/Result.cs

@@ -0,0 +1,39 @@
+namespace ChatBot.Common.Results
+{
+    /// <summary>
+    /// Represents the result of an operation that can succeed or fail
+    /// </summary>
+    public class Result
+    {
+        public bool IsSuccess { get; }
+        public string Error { get; }
+
+        protected Result(bool isSuccess, string error)
+        {
+            IsSuccess = isSuccess;
+            Error = error;
+        }
+
+        public static Result Success() => new(true, string.Empty);
+
+        public static Result Failure(string error) => new(false, error);
+    }
+
+    /// <summary>
+    /// Represents the result of an operation that returns a value
+    /// </summary>
+    public class Result<T> : Result
+    {
+        public T? Value { get; }
+
+        private Result(T? value, bool isSuccess, string error)
+            : base(isSuccess, error)
+        {
+            Value = value;
+        }
+
+        public static Result<T> Success(T value) => new(value, true, string.Empty);
+
+        public static new Result<T> Failure(string error) => new(default, false, error);
+    }
+}