test if two strings have matching first chars ignoring case

		public static int MatchingBeginningCharactersInTwoStringsIgnoringCase(string _string1, string _string2){
			int matching = 0;
			int numCharToCompare = 0;
			string first = _string1.ToLower();
			string two = _string2.ToLower();
			char[] firstArray = first.ToCharArray();
			char[] secondArray = two.ToCharArray();
			if(first.Length > two.Length){
				numCharToCompare = two.Length;
			}else{
				numCharToCompare = first.Length;
			}
			for(int i=0; i < numCharToCompare; i++){
				if(firstArray[i] == secondArray[i]){ matching++;}
			}
			return matching;
		}