Rename AlphanumericEncoder.CanEncode (#675)

* Rename AlphanumericEncoder.CanEncode

* update

Author: Shane32

QRCoder/QRCodeGenerator.cs

@@ -750,7 +750,7 @@ private static EncodingMode GetEncodingFromPlaintext(string plainText, bool forc
             if (IsInRange(c, '0', '9'))
                 continue;   // numeric - char.IsDigit() for Latin1
             result = EncodingMode.Alphanumeric;     // not numeric, assume alphanumeric
-            if (AlphanumericEncoder.CanEncode(c))
+            if (AlphanumericEncoder.CanEncodeNonDigit(c))
                 continue; // alphanumeric
             return EncodingMode.Byte;               // not numeric or alphanumeric, assume byte
         }

QRCoder/QRCodeGenerator/AlphanumericEncoder.cs

@@ -36,9 +36,9 @@ private static Dictionary<char, int> CreateAlphanumEncDict(char[] alphanumEncTab
         }
 
         /// <summary>
-        /// Checks if a character is present in the alphanumeric encoding table.
+        /// Checks if a non-digit character is present in the alphanumeric encoding table.
         /// </summary>
-        public static bool CanEncode(char c) => IsInRange(c, 'A', 'Z') || Array.IndexOf(_alphanumEncTable, c) >= 0;
+        public static bool CanEncodeNonDigit(char c) => IsInRange(c, 'A', 'Z') || Array.IndexOf(_alphanumEncTable, c) >= 0;
 
         /// <summary>
         /// Converts alphanumeric plain text into a binary format optimized for QR codes.