如何使用'Type'类型(How to use the type 'Type')

 我知道我可以使用类型string ： 
 
string someString = "This is my string";
 
 我不知道如何使用Type 
 
Type someType = someString.GetType();
 
 我怎样才能根据该类型创建变量。 我想做点什么 
 
someType someOtherString = "here is another string";
//string 
 
 换句话说，我怎么能根据某种类型创建变量？ 

I know that I can use the type string as:
 
string someString = "This is my string";
 
I am not sure how to use the type Type
 
Type someType = someString.GetType();
 
How could I create a variable based on that type. I want to do something like 
 
someType someOtherString = "here is another string";
//string 
 
In other words, how could I create a variable based on some type?

原文：https://stackoverflow.com/questions/6103172