Convert a string to a datatype base on a string that contains datatype name

I am converting a string to a datatype based on the another string that contains the name of datatype. I have two string like below:

string string_1 = "true";

string string_2 = "System.Boolean";

i need to convert the string 1 to the data type that is specified in string 2. how can i do that?(note that the string_2 can be each datatype) must i use if's for checking string_2 with any type of datatype?