I can succesffuly login in in the condition of imporinting 'Server'
project in the client side, which contains 'LoginManager' class.
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The third reference is the 'Server' project. once i import this, my program runs properly.
but once i remove it from the client side reference list.
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program will always have errors in the Server side. i have written 2 different programs, err are different since i removed 'Server' reference.
the first program's error
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the second program's error
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these two errors occur after i removed 'Server' project from the client side. once i add this reference, both of these 2 error will not occur. But 'Server' project which contains 'LoginManager.cs' shouldn't be imported in the client side I think.