in CLR via C-sharp, it is mentioned that calling a common initialization constructor reduces the amount of code generated (164pages).
the following code, which the book says, because there are three constructors, compiles and generates three times the code that initializes m _ constructor _.

class SomeType
{
    private Int32 m_x = 5;
    private String m_s = "Hi";
    private Double m_d = 3.14;
    private Byte m_b;

    public SomeType() { }
    public SomeType( Int32 x) { }
    public SomeType( String s) {  ...;  m_d = 10; }
}

while the following code uses a common initialization constructor to reduce the generated code. Excuse me, why does this reduce the generated code?
the public initialization constructor will also be called three times, so it will still initialize minitix, minitism, and minitid three times.

class SomeType
{
    private Int32 m_x ;
    private String m_s ;
    private Double m_d;
    private Byte m_b;

    public SomeType() {
          m_x = 5;
          m_s = "Hi";
          m_d = 3.14;
}
    public SomeType( Int32 x) :this(){
        m_x = x;
    }
    public SomeType( String s):this() {
        m_s = s;
    }
    public SomeType( Int32 x,String s):this()
    {
        m_x = x;
        m_s = s;
    }
}