Question

I have a class like below:-

public Class Student
{
  string Name {get; set;}
  int Age {get; set;}
  Address studentAddres {get; set;}
}

public class Address
{
 string Street{get; set;}
 string City {get; set;}
}

Here Name and Age are System Define type and StudentAddres is custom type. How to differentiate between them using code.
I am using Reflection but not able to achieve.

Answer 1

It seems that you want to see either a value type or a string. Then you can use:
Type.IsPrimitive property

Gets a value indicating whether the Type is one of the primitive
types.

The primitive types are Boolean, Byte, SByte, Int16, UInt16, Int32,
UInt32, Int64, UInt64, IntPtr, UIntPtr, Char, Double, and Single.

int i = 10;
string str = "";
var isPrimitive = i.GetType().IsValueType || i is string; // returns true since i is value type
var isPrimitiveWithString = str.GetType().IsValueType || str is string; 
 // returns true

CustomClass obj = new CustomClass();
var isPrimitive3 = obj.GetType().IsPrimitive; // returns false