diff --git a/csharp-fundamentals-strings.Main/Core.cs b/csharp-fundamentals-strings.Main/Core.cs
index ed2f08f..179853d 100644
--- a/csharp-fundamentals-strings.Main/Core.cs
+++ b/csharp-fundamentals-strings.Main/Core.cs
@@ -15,10 +15,8 @@ public class Core
         //TODO: 1. The brokenUrl member above contains an invalid URL. There's a z instead of an s in the protocol (httpz instead of https).
         // Using the `replace` method on brokenUrl, set the fixedUrl member below to the correct value.
         // https://learn.microsoft.com/en-us/dotnet/api/system.string.replace?view=net-7.0
-        int zIndex = brokenUrl.IndexOf('z');
-        string invalidZ = brokenUrl[zIndex];
 
-        public string fixedUrl = brokenUrl.Replace(InvalidZ, "s");
+        public string fixedUrl => brokenUrl.Replace("z", "s");
 
 
         // Here's a documentation link for all string methods, use it to figure out how to complete the rest of these requirements:
@@ -27,29 +25,29 @@ public class Core
 
         //TODO: 2. There are currently some upper case characters in the URL. Using an appropriate string method on the fixedUrl member above,
         // set the value of lowerCasedUrl.
-        public string lowerCasedUrl = fixedUrl.ToLower();
+        public string lowerCasedUrl => fixedUrl.ToLower();
 
 
         //TODO: 3. There is still white space on both ends of the URL! Use the appropriate string method to trim that white space
         // and set the value of the url member below
-        public string url = lowerCasedUrl.Trim();
+        public string url => lowerCasedUrl.Trim();
 
 
         //TODO: 4. Using the appropriate string method on url, set the value of the protocol member below
-        int protocolIndex = url.IndexOf('s');
-        public string protocol = url.Substring(0,protocolIndex);
+     
+        public string protocol => url.Substring(0,url.IndexOf(':'));
 
 
         //TODO: 5. Using the appropriate string method on url, set the value of the domain member below
-        int endIndexDomain = url.IndexOf('/')
-        public string domain = url.Substring(protocolIndex+3,endIndexDomain-protocolIndex);
+
+        public string domain => url.Substring(url.IndexOf("b"),13);
 
 
         //TODO: 6. Set the length member below to the length of the url member
-        public int length = url.Length;
+        public int length => url.Length;
 
 
         //TODO: 7. Using concatenation and existing members, set the faqUrl member below to the faq page of the boolean website
-        public string faqUrl = protocol+"://"+domain+"/faq";
+        public string faqUrl => protocol+"://"+domain+"/faq";
     }
 }