System.ComponentModel.MaskedTextProvider.SetString C# (CSharp) Method

        private void SetString(string input, int testPosition)
        {
            foreach (char ch in input)
            {
                // If character is not to be escaped, we need to find the first edit position to test it in.
                if (!TestEscapeChar(ch, testPosition))
                {
                    testPosition = FindEditPositionFrom(testPosition, forward);
                }

                SetChar(ch, testPosition);
                testPosition++;
            }
        }