Compiler Error CS0428

Cannot convert method group 'Identifier' to non-delegate type 'type'. Did you intend to invoke the method?

This error occurs when converting a method group to a non-delegate type, or attempting to invoke a method without using parentheses.

Example

The following sample generates CS0428:

// CS0428.cs  
namespace ConsoleApplication1  
{  
    class Program  
    {  
        delegate int Del1();  
        delegate object Del2();  
  
        static void Main(string[] args)  
        {  
            ExampleClass ec = new ExampleClass();  
  
            // The following assignment statement causes compiler error CS0428.  
            // It attempts to assign the address of Method1 to an integer variable.
            // You can only assign the address to an appropriate delegate type.
            int i = ec.Method1;  
  
            // Del1 is a delegate type that is appropriate for a method like
            // Method1 that returns an int. The following assignment statement  
            // does not cause an error.  
            Del1 d1 = ec.Method1;  
  
            // You can invoke Method1 and assign the int that is returned to
            // integer variable i.  
            i = ec.Method1();  
  
            // The following assignment statement causes compiler error CS0428.  
            // It attempts to assign the address of Method2 to an instance of
            // ExampleClass. You can only assign the address to a delegate type.
            ec = ExampleClass.Method2;
  
            // Del2 is a delegate type that is appropriate for a method like
            // Method2 that returns an instance of a class. The following assignment  
            // statement does not cause an error.  
            Del2 d2 = ExampleClass.Method2;  
  
            // Similarly, you can invoke Method2 and assign the result returned to ec.  
            ec = ExampleClass.Method2();  
        }  
    }  
  
    public class ExampleClass  
    {  
        public int Method1() { return 1; }  
        public static ExampleClass Method2() { return null; }  
    }  
}