PowerShell · iSazonov · May 8, 2025 · Apr 21, 2025 · Apr 22, 2025 · Apr 22, 2025
@@ -199,8 +199,19 @@ public override bool CanConvertFrom(object sourceValue, Type destinationType)
         /// <exception cref="PSInvalidCastException">When no conversion was possible.</exception>
         public override object ConvertFrom(object sourceValue, Type destinationType, IFormatProvider formatProvider, bool ignoreCase)
         {
-            string sourceAsString = (string)LanguagePrimitives.ConvertTo(sourceValue, typeof(string), formatProvider);
+            // Fix: Remove commas from numeric strings before conversion to prevent casting errors.
+            string sourceAsString = LanguagePrimitives.ConvertTo(sourceValue, typeof(string), formatProvider) as string;
+
+            if (sourceAsString != null){
+
+                string groupSeparator = formatProvider?.GetFormat(typeof(NumberFormatInfo)) is NumberFormatInfo nfi 
+                    ? nfi.NumberGroupSeparator 
+                    : CultureInfo.CurrentCulture.NumberFormat.NumberGroupSeparator;
+
+                sourceAsString = sourceAsString.Replace(groupSeparator, string.Empty); // Remove culture-specific group separator
+            }
             return LanguagePrimitives.ConvertTo(sourceAsString, destinationType, formatProvider);
+
         }
 
         /// <summary>
@@ -2943,17 +2954,12 @@ private static object ConvertStringToInteger(
                     return result;
                 }
 
-                if (resultType == typeof(BigInteger))
-                {
-                    // Fallback for BigInteger: manual parsing using any common format.
-                    NumberStyles style = NumberStyles.AllowLeadingSign
-                        | NumberStyles.AllowDecimalPoint
-                        | NumberStyles.AllowExponent
-                        | NumberStyles.AllowHexSpecifier;
-
+               if (resultType == typeof(BigInteger))
+               { 
+                    NumberStyles style = NumberStyles.Integer | NumberStyles.AllowThousands;
+
                     return BigInteger.Parse(strToConvert, style, NumberFormatInfo.InvariantInfo);
                 }
-
                 // Fallback conversion for regular numeric types.
                 return GetIntegerSystemConverter(resultType).ConvertFrom(strToConvert);
             }