Decimals should not be displayed.

The documentation of the double struct is at:

Double Struct (System) | Microsoft Learn
https://learn.microsoft.com/en-us/dotnet/api/system.double?view=net-7.0
 

There are Floor and Round static methods. When you use a cast, and when you use the Flour method, the decimal portion is discarded. The Round method will round (up or down). The following:

Code Snippet

public static void Main()
{
    Show(19.03);
    Show(19.97);
}

public static void Show(double data)
{
    Console.WriteLine($"Data: {data}; Cast: {(Int32)data}; floor: {double.Floor(data)}; round: {double.Round(data)}");
}

Produces:

Data: 19.03; Cast: 19; floor: 19; round: 19

Data: 19.97; Cast: 19; floor: 19; round: 20

Note that Round works differently than the others.

double data = 19.03;
Console.WriteLine("Converted from {0}, to {1}", data, (Int32)data);