Initial update to .net core 6 rc2, haven't run it yet

server/AyaNova/util/FileHash.cs

@@ -13,7 +13,9 @@ namespace AyaNova.Util
         {
             using (FileStream stream = File.OpenRead(filePath))
             {
-                SHA256Managed sha = new SHA256Managed();
+                
+                //SHA256Managed sha = new SHA256Managed();
+                var sha= SHA256.Create();
                 byte[] checksum = sha.ComputeHash(stream);
                 return BitConverter.ToString(checksum).Replace("-", String.Empty);
             }

server/AyaNova/util/Hasher.cs

@@ -55,7 +55,8 @@ namespace AyaNova.Util
                 throw new ArgumentException("characterSet must not be empty", "characterSet");
 
             var bytes = new byte[length * 8];
-            new RNGCryptoServiceProvider().GetBytes(bytes);
+            //new RNGCryptoServiceProvider().GetBytes(bytes);
+            RandomNumberGenerator.Create().GetBytes(bytes);
             var result = new char[length];
             for (int i = 0; i < length; i++)
             {