Initial commit

205. Isomorphic Strings/Solution.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _205._Isomorphic_Strings;
+
+public class Solution
+{
+    public bool IsIsomorphic(string s, string t)
+    {
+        Dictionary<char, char> table = new Dictionary<char, char>();
+        Dictionary<char, char> antiTable = new Dictionary<char, char>();
+        for(int i = 0; i < s.Length; i++)
+        {
+            char source = s[i];
+            char to = t[i];
+            if (table.ContainsKey(source))
+            {
+                if(table[source] != to)
+                    return false;
+            }
+            else
+                table.Add(source, to);
+
+            if (antiTable.ContainsKey(to))
+            {
+                if (antiTable[to] != source)
+                    return false;
+            }
+            else
+                antiTable.Add(to, source);
+        }
+        return true;
+    }
+}