Complete code

Complete code

• Oanimao

  The compiler can infer the generic types in the case of the first function because the types are used as arguments. It cannot do this in the second function because I and J are not used in the parameters. This is an educated guess on my part, but when it sees the first call to InferParams, it sees that the types I and J are explicitly specified, so it calls the method where the types I and J could not have been inferred. In the second case, the types for I and J are not specified, and so they must be inferred. So, it has no choice but to call the first method, since it can't infer the arguments for the second InferParams method.

  
  

• Peter Gissel

  using System;
  using System.Collections.Generic;
  using System.Text;

  namespace ConsoleApplication1
  {
  public class Program
  {
  public static void Main(string[] args)
  {
  A a = new A();
  Console.WriteLine(a.InferParams<int, string>(0, ""));
  Console.WriteLine(a.InferParams(0, ""));
  Console.ReadLine();
  }
  }

  public class A
  {
  public A()
  {
  }

  public string InferParams<I, J>(I val1, J val2)
  {
  return "123";
  }

  public string InferParams<I, J>(int val1, string val2)
  {
  return "321";
  }
  }
  }
  

  Output:

  321

  123

  
  
  
• Complete code