Changed the discord bot to be case insensitive.

Added IsEmpty and HasOne IEnumerable Extensions.

src/ServerManager.Updater/Extensions/IEnumerableExtensions.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServerManagerTool.Updater
+{
+    public static class IEnumerableExtensions
+    {
+        public static bool IsEmpty<TSource>(this IEnumerable<TSource> source)
+        {
+            if (source == null)
+            {
+                throw new ArgumentNullException(nameof(source));
+            }
+
+            using (IEnumerator<TSource> enumerator = source.GetEnumerator())
+            {
+                if (enumerator.MoveNext())
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        public static bool HasOne<TSource>(this IEnumerable<TSource> source)
+        {
+            if (source == null)
+            {
+                throw new ArgumentNullException(nameof(source));
+            }
+
+            var count = 0;
+
+            using (IEnumerator<TSource> enumerator = source.GetEnumerator())
+            {
+                while (enumerator.MoveNext())
+                {
+                    if (++count > 1) 
+                        return false;
+                }
+            }
+
+            return count == 1;
+        }
+    }
+}