C# | Método Convert.GetTypeCode(Objeto)

Este método se utiliza para devolver el TypeCode para el objeto especificado.
Sintaxis:

public static TypeCode GetTypeCode (object value);

Aquí, el valor es un objeto que implementa la interfaz IConvertible .
Valor de retorno: este método devuelve el código de tipo para el valor, o vacío si el valor es nulo .
Los siguientes programas ilustran el uso del método Convert.GetTypeCode(Object) :
Ejemplo 1: 

// C# program to demonstrate
// Convert.GetTypeCode() Method
using System;
 
class GFG {
 
    // Main Method
    public static void Main()
    {
 
        // Declaring val1 and val2
        string val1;
        bool val2;
 
        // initializing the
        // val1 and val2
        val1 = "abab";
        val2 = true;
 
        // getting TypeCode
        // using Convert.GetTypeCode() method
        TypeCode t1 = Convert.GetTypeCode(val1);
        TypeCode t2 = Convert.GetTypeCode(val2);
 
        // Display TypeCode
        Console.WriteLine("TypeCode of val1 is {0}", t1);
        Console.WriteLine("TypeCode of val2 is {0}", t2);
    }
}

TypeCode of val1 is String
TypeCode of val2 is Boolean

Ejemplo 2:

// C# program to demonstrate
// Convert.GetTypeCode() Method
using System;
 
class GFG {
 
    // Main Method
    public static void Main()
    {
 
        // Declaring val1 and val2
        char val1;
        float val2;
 
        // initializing the
        // val1 and val2
        val1 = 'a';
        val2 = 20f;
 
        // calling get() method
        get(val1);
        get(val2);
    }
 
    // Defining the get() method
    public static void get(char val)
    {
 
        // getting TypeCode
        // using Convert.GetTypeCode() method
        TypeCode t = Convert.GetTypeCode(val);
 
        // Display the TypeCode
        Console.WriteLine("TypeCode of {0}"+
                         " is {1}", val, t);
    }
    public static void get(float val)
    {
 
        // getting TypeCode
        // using GetTypeCode() method
        TypeCode t = Convert.GetTypeCode(val);
 
        // Display the TypeCode
        Console.WriteLine("TypeCode of {0}"+
                         " is {1}", val, t);
    }
}

TypeCode of a is Char
TypeCode of 20 is Single

Referencia: 

• https://docs.microsoft.com/en-us/dotnet/api/system.convert.gettypecode?view=netframework-4.7.2