System.Void cannot be used from C#

Hello Friends,

 

Could you please some one explain why I am getting this compilation error

"System.Void cannot be used from C# -- use typeof(void) to get the void type object"

i have method called

} 

when i am compiling the program , i am getting Error message "System.Void cannot be used from C# -- use typeof(void) to get the void type object".

 

Thanks in advance.