How to display alert message with '&' in asp.net c#?

Question

i have enter the value in textbox is(test_01&23683)

now i want to show the below message

 

Response.Redirect("example.aspx?message=File (" + Textbox1.Text + ") Uploaded Successfully, false); 

 

actual message is file test_01&23683 uploaded successfully.

 

but the message is shown

 

File test_01 

 

another part of the message is ignored how to display the full message 

how to do?