How can find the type of generic property via reflection in c#.

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I have a model with property of generic List <t>. how can i find the type of that List dynamically via reflection.

C#

public class Sample{

public int Id{get; set;}

public List<int?> Prop1{get; set;}
public List<myclass> Prop2{get; set;}
}

how can find the type of List like int? or MyClass

What I have tried:

C#

PropertyInfo[] Props = typeof(SampleSample).GetProperties(BindingFlags.Public | BindingFlags.Instance);

i am able to find the property is generic List

C#

Props["Prop1"].PropertyType.IsGenericType && Props["Prop1"].PropertyType.GetGenericTypeDefinition() == typeof(List<>)

but not able to find the type of list.

Posted 12-May-21 4:37am

Siddharth Rai

Updated 12-May-21 4:51am

Chris Copeland

v2

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Chris Copeland · Accepted Answer · 2021-05-12T04:49:00

Solution 1

Here's an example using the Type.GetGenericArguments()[^] method:

C#

public class Example
{
  public List<int?> Target { get; set; }
}


Type type = typeof(Example).GetProperty("Target").PropertyType;
Type generic = type.GetGenericArguments().First();

Console.WriteLine($"Type {type} has generic argument {generic}");

The method returns an array so you can either use First() to select the first element, or use the standard array indexer [0]

Posted 12-May-21 4:49am

Chris Copeland

Comments

Maciej Los 12-May-21 12:22pm

5ed!

BillWoodruff 12-May-21 21:03pm

+5

Siddharth Rai 12-May-21 23:39pm

Thanks,