Question

Consider Following class

class A<T> where T:new()
{
  public static T Instance = new T();
  A()
  {
  }
}

I have 2 questions

1. I need Instance object with Reflection. I have tried following

   var type = typeof(A<int>);  
   // var type = typeof(A<>).MakeGenericType(typeof(int)); // Also tried this
   
   var instanceMember1 = type.GetMember("Instance",  BindingFlags.Static );  // returns null
   var instanceMember2 = type.GetField("Instance",  BindingFlags.Static ); // returns null
   

   I have also tried to Change Instance to property and call GetProperty with no success.

2. After removing new() constraint and making constructor private, How to invoke private (parameterless) constructor through reflection.

Answer 1

Add BindingFlags.Public to your flags for GetField.

var instanceMember1 = type.GetField("Instance", BindingFlags.Static |
    BindingFlags.Public);

To invoke the private constructor:

var ctor = type.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, 
    null, Type.EmptyTypes, new ParameterModifier[0]);
var instance = ctor.Invoke(null) as A<int>;