C# | Establecer la capacidad en el número real de elementos en un objeto SortedList

El método SortedList.TrimToSize se usa para establecer la capacidad en el número real de elementos en un objeto SortedList.
Sintaxis: 
 

public virtual void TrimToSize ();

Excepción: este método generará NotSupportedException si el objeto SortedList es de solo lectura o si SortedList tiene un tamaño fijo .
Los siguientes programas ilustran el uso del método mencionado anteriormente:
Ejemplo 1:
 

// C# program to illustrate the
// SortedList.TrimToSize() Method
using System;
using System.Collections;
 
class GFG {
 
    // Main method
    public static void Main()
    {
 
        // create and initialize new SortedList
        SortedList mylist = new SortedList();
 
        // Adding elements to SortedList
        mylist.Add("1", "C++");
        mylist.Add("2", "Java");
        mylist.Add("3", "DSA");
        mylist.Add("4", "Python");
        mylist.Add("5", "C#");
        mylist.Add("6", "HTML");
 
        // Capacity of SortedList before trimmimg
        Console.WriteLine("Before trimming the capacity is: {0}",
                                                mylist.Capacity);
 
        // trim the SortedList
        mylist.TrimToSize();
 
        // Capacity of ArrayList after trimming
        Console.WriteLine("After trimming the capacity is: {0}",
                                               mylist.Capacity);
    }
}

Before trimming the capacity is: 16
After trimming the capacity is: 6

Ejemplo 2:

// C# program to illustrate
// SortedList.TrimToSize() Method
using System;
using System.Collections;
 
class GFG {
 
    // Main Method
    public static void Main()
    {
 
        // create and initialize new SortedList
        SortedList mylist = new SortedList();
 
        // Adding elements to SortedList
        mylist.Add("h", "Hello");
        mylist.Add("g", "Geeks!");
        mylist.Add("w", "Welcome");
        mylist.Add("t", "to");
        mylist.Add("n", "Noida");
 
        // Displaying the count, capacity
        // and values of the SortedList.
        Console.WriteLine("Before Using TrimToSize Method:");
        Console.WriteLine();
        Console.WriteLine("Count: {0}", mylist.Count);
        Console.WriteLine("Capacity: {0}", mylist.Capacity);
        Console.Write("Values are: ");
        Display(mylist);
 
        Console.WriteLine();
 
        // Trim the SortedList.
        mylist.TrimToSize();
 
        // Displaying the count, capacity
        // and values of the SortedList.
        Console.WriteLine();
        Console.WriteLine("After Using TrimToSize Method:");
        Console.WriteLine();
        Console.WriteLine("Count: {0}", mylist.Count);
        Console.WriteLine("Capacity: {0}", mylist.Capacity);
        Console.Write("Values are: ");
        Display(mylist);
 
        // Clear the SortedList
        mylist.Clear();
 
        Console.WriteLine();
 
        // Displaying the count, capacity
        // and values of the SortedList.
        Console.WriteLine();
        Console.WriteLine("After Using Clear Method:");
        Console.WriteLine();
        Console.WriteLine("Count: {0}", mylist.Count);
        Console.WriteLine("Capacity: {0}", mylist.Capacity);
        Console.Write("Values are: ");
        Display(mylist);
 
        // again trim the SortedList
        mylist.TrimToSize();
 
        Console.WriteLine();
 
        // Displaying the count, capacity
        // and values of the SortedList.
        Console.WriteLine();
        Console.WriteLine("After Again Using TrimToSize Method:");
        Console.WriteLine();
        Console.WriteLine("Count: {0}", mylist.Count);
        Console.WriteLine("Capacity: {0}", mylist.Capacity);
        Console.Write("Values are: ");
        Display(mylist);
    }
 
    // to display the values of SortedList
    public static void Display(SortedList mylist)
    {
        // taking an IList and
        // using GetValueList method
        IList vlist = mylist.GetValueList();
 
        for (int i = 0; i < mylist.Count; i++)
            Console.Write(vlist[i] + " ");
    }
}

Before Using TrimToSize Method:

Count: 5
Capacity: 16
Values are: Geeks! Hello Noida to Welcome 

After Using TrimToSize Method:

Count: 5
Capacity: 5
Values are: Geeks! Hello Noida to Welcome 

After Using Clear Method:

Count: 0
Capacity: 5
Values are: 

After Again Using TrimToSize Method:

Count: 0
Capacity: 0
Values are:

Nota:  

• El uso principal de este método es que puede usarse para minimizar la sobrecarga de memoria de una colección si no se agregarán nuevos elementos a la colección.
• Para restablecer un objeto SortedList a su estado inicial, llame al método Clear antes de llamar a TrimToSize. Recortar una SortedList vacía establece la capacidad de la SortedList en la capacidad predeterminada.
• Este método es una operación O(n), donde n es Count.

Referencia: 
 

• https://docs.microsoft.com/en-us/dotnet/api/system.collections.sortedlist.trimtosize?view=netframework-4.7.2