Returns a new string in which all the characters in the current instance, beginning at a specified position and continuing through the last position, have been deleted.
In the dnprdnshort, strings are zero-based. The value of the startIndex parameter can range from zero to one less than the length of the string instance.
This method does not modify the value of the current instance. Instead, it returns a new string in which all characters from position startIndex to the end of the original string have been removed.