I apologize if this question has already been asked. Also, please bear with me as I am new to C# and just beginning to learn it. I am trying to write a simple program (hello world) to learn, but when I compile the program I get an error. Below is the screen shot after I try to build the solution. I would appreciate any help on this. 
I apologize if this question has already been asked. Also, please bear with me
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Main, notmain. C# is case-sensitive.