C# | Type.GetNestedType() Method
Last Updated :
11 Jul, 2025
Type.GetNestedType() Method is used to get a specific type nested within the current Type. There are 2 methods in the overload list of this method as follows:
- GetNestedType(String, BindingFlags) Method
- GetNestedType(String) Method
GetNestedType(String, BindingFlags) Method
This method is used to search for the specified nested type, using the specified binding constraints when overridden in a derived class.
Syntax: public abstract Type GetNestedType (string name, System.Reflection.BindingFlags bindingAttr);
Parameters:
name: The string containing the name of the nested type to get.
bindingAttr: A bitmask comprised of one or more BindingFlags that specify how the search is conducted Or Zero, to return null.
Return Value: This method returns an object representing the nested type which matches the specified requirements if found; otherwise, null.
Exception: This method throws
ArgumentNullException if name is null.
Below programs illustrate the use of the above-discussed method:
Example 1:
csharp
// C# program to demonstrate the
// Type.GetNestedType(String,
// BindingFlags) Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Person);
// try-catch block for handling Exception
try {
Type type = objType.GetNestedType("Student",
BindingFlags.Public | BindingFlags.Instance);
// Display the Result
Console.Write("NestedType of current type is: ");
Console.WriteLine(" {0}", type);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
public class Person {
public class Student {
// string name;
// int roll;
// string dept;
}
public class Teacher {
// string name;
// string dept;
// int id;
}
}
Output:
NestedType of current type is: Person+Student
Example 2:
csharp
// C# program to demonstrate the
// Type.GetNestedType(String,
// BindingFlags) Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Person);
// try-catch block for handling Exception
try {
Type type = objType.GetNestedType(null,
BindingFlags.Public | BindingFlags.Instance);
// Display the Result
Console.Write("NestedType of current type is: ");
Console.WriteLine(" {0}", type);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.WriteLine("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
// Defining Person class
public class Person {
// Defining class Student
public class Student {
// string name;
// int roll;
// string dept;
}
// Defining class Teacher
public class Teacher {
// string name;
// string dept;
// int id;
}
}
Output:
name is null.
Exception Thrown: System.ArgumentNullException
GetNestedType(String) Method
This method is used to search for the public nested type with the specified name.
Syntax: public Type GetNestedType (string name);
Here, it takes the string containing the name of the nested type to get.
Return Value: This method returns an object representing the public nested type with the specified name if found; otherwise, null.
Exception: This method throws ArgumentNullException if name is null.
Example 1:
csharp
// C# program to demonstrate the
// Type.GetNestedType(String) Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Person);
// try-catch block for handling Exception
try {
Type type = objType.GetNestedType("Teacher");
// Display the Result
Console.Write("NestedType of current type is: ");
Console.WriteLine(" {0}", type);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.WriteLine("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
// Defining Person class
public class Person {
// Defining class Student
public class Student {
// string name;
// int roll;
// string dept;
}
// Defining class Teacher
public class Teacher {
// string name;
// string dept;
// int id;
}
}
Output:
NestedType of current type is: Person+Teacher
Example 2:
csharp
// C# program to demonstrate the
// Type.GetNestedType(String)
// Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Person);
// try-catch block for handling Exception
try {
Type type = objType.GetNestedType(null);
// Display the Result
Console.Write("NestedType of current type is: ");
Console.WriteLine(" {0}", type);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.WriteLine("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
// Defining Person class
public class Person {
// Defining class Student
public class Student {
// string name;
// int roll;
// string dept;
}
// Defining class Teacher
public class Teacher {
// string name;
// string dept;
// int id;
}
}
Output:
name is null.
Exception Thrown: System.ArgumentNullException
Reference: