Added Dispose method

Crypto Notepad/AES.cs

@@ -28,7 +28,7 @@ public AESMetadata()
         public void DeleteMetadataFromBuffer(ref byte[] rawData)
         {
             byte[] buffer = new byte[rawData.Length - this.OffsetToData];
-            System.Buffer.BlockCopy(rawData, this.OffsetToData, buffer, 0, rawData.Length - this.OffsetToData);
+            Buffer.BlockCopy(rawData, this.OffsetToData, buffer, 0, rawData.Length - this.OffsetToData);
             rawData = buffer;
         }
 
@@ -172,6 +172,7 @@ public static string Encrypt(string plainText, string password,
             }
 
             symmetricKey.Dispose();
+            derivedPassword.Dispose();
             return Convert.ToBase64String(cipherTextBytes);
         }
 
@@ -240,6 +241,7 @@ public static string Decrypt(string cipherText, string password, string salt = "
                 symmetricKey.Dispose();
             }
 
+            derivedPassword.Dispose();
             return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
         }
     }

Crypto Notepad/EncryptedString.cs

@@ -1,16 +1,19 @@
 using System.Text;
 using System.Security.Cryptography;
+using System;
 
 namespace Crypto_Notepad
 {
     /// <summary>
     /// Stores a string encrypted in memory to defend against memory dumps
     /// </summary>
-    class EncryptedString
+    class EncryptedString: IDisposable
     {
-        private TripleDES des = TripleDESCryptoServiceProvider.Create();
+        private readonly TripleDES des = TripleDES.Create();
         private byte[] encryptedString = null;
 
+        public void Dispose() => des.Dispose();
+
         public EncryptedString(string String)
         {
             des.GenerateIV();