Add ConvertFromBytesWithoutBom to convert BOM encoded texts without BOM

framework/src/Volo.Abp.Core/Volo/Abp/Text/StringHelper.cs

@@ -0,0 +1,37 @@
+using System.Text;
+
+namespace Volo.Abp.Text
+{
+    public class StringHelper
+    {
+        /// <summary>
+        /// Converts a byte[] to string without BOM (byte order mark).
+        /// </summary>
+        /// <param name="bytes">The byte[] to be converted to string</param>
+        /// <param name="encoding">The encoding to get string. Default is UTF8</param>
+        /// <returns></returns>
+        public static string ConvertFromBytesWithoutBom(byte[] bytes, Encoding encoding = null)
+        {
+            if (bytes == null)
+            {
+                return null;
+            }
+
+            if (encoding == null)
+            {
+                encoding = Encoding.UTF8;
+            }
+
+            var hasBom = bytes.Length >= 3 && bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF;
+
+            if (hasBom)
+            {
+                return encoding.GetString(bytes, 3, bytes.Length - 3);
+            }
+            else
+            {
+                return encoding.GetString(bytes);
+            }
+        }
+    }
+}