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How to get the URL of the current page using C#

I have often came across a question where developer look to ways to get different page URL

 Below example will show you have to get different url and its segments

Let us say my page URL is 
http://localhost:51259/TEST.aspx?querystringOne=one

Below is code snippet to get different segments of URL 
Response.Write("<br/> 1= " + HttpContext.Current.Request.Url.Host);
Response.Write("<br/> 2= " + HttpContext.Current.Request.Url.Authority);
Response.Write("<br/> 3= " + HttpContext.Current.Request.Url.Port);
Response.Write("<br/> 4= " + HttpContext.Current.Request.Url.AbsolutePath);
Response.Write("<br/> 5= " + HttpContext.Current.Request.ApplicationPath);
Response.Write("<br/> 6= " + HttpContext.Current.Request.Url.AbsoluteUri);
Response.Write("<br/> 7= " + HttpContext.Current.Request.Url.PathAndQuery);

Result from above code is as 

1= localhost
2= localhost:51259
3= 51259
4= /TEST.aspx
5= /
6= http://localhost:51259/TEST.aspx?querystringOne=one
7= /TEST.aspx?querystringOne=one 

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