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  1. using System;
  2. using System.Reflection;
  3. using System.Linq;
  4.  
  5.  
  6. public static class TypeExtensions {
  7.  
  8.     public static MethodInfo GetMethod(this Type type, string name, BindingFlags bindingAttr, Type[] types, Type returnType ) {
  9.         var methods = type
  10.             .GetMethods(BindingFlags.Static | BindingFlags.Public)
  11.             .Where(mi => mi.Name == "op_Explicit")
  12.             .Where(mi => mi.ReturnType == typeof(int));
  13.  
  14.         if (!methods.Any())
  15.             return null;
  16.  
  17.         if (methods.Count() > 1)
  18.             throw new System.Reflection.AmbiguousMatchException();
  19.  
  20.  
  21.         return methods.First();
  22.     }
  23.  
  24.       public static MethodInfo GetImplicitCastToMethod(this Type type, Type returnType ) 
  25.     {        
  26.         return type.GetMethod("op_Implicit", BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, new Type[] { type }, returnType);
  27.     }
  28.  
  29.     public static MethodInfo GetExplicitCastToMethod(this Type type, Type returnType ) 
  30.     {        
  31.         MethodInfo method = null;
  32.  
  33.         method = type.GetMethod("op_Explicit", BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, new Type[] { type }, returnType);
  34.         if (method != null)
  35.             return method;
  36.  
  37.         method = returnType.GetMethod("op_Explicit", BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, new Type[] { returnType }, type);
  38.         return method;             
  39.     }
  40.  
  41.  
  42. }
  43.  
  44. public class Test
  45. {
  46.  
  47. 	public static void Main()
  48. 	{       
  49.  
  50.         MethodInfo m = typeof(IntPtr).GetImplicitCastToMethod(typeof(int));
  51.         Console.WriteLine(m);
  52.         object d = m.Invoke(null, new object[] { new IntPtr(0) });
  53.         Console.WriteLine(d);
  54. 	}
  55. }
Success #stdin #stdout 0.04s 34048KB
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Int32 op_Explicit(IntPtr)
0
https://ideone.com/9Gqvbz
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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