prog.cs(3,17): error CS1502: The best overloaded method match for `X.HOGE(fuga)' has some invalid arguments
prog.cs(5,28): (Location of the symbol related to previous error)
prog.cs(3,17): error CS1503: Argument `#1' cannot convert `null' expression to type `fuga'
Compilation failed: 2 error(s), 0 warnings