The best overloaded method match for 'declaration' has some invalid arguments
A class method was called but there is no form of the method that takes the necessary number of arguments with the necessary data types.
The following sample generates CS1502:
namespace x { public class a { public a(char i) { } /* try this constructor instead public a(int i) { } */ public static void Main() { a aa = new a(2222); // CS1502 } } }