C# – How to Call Other Constructors from a Constructor

Append :this(required params) at the end of the constructor to do 'constructor chaining'

public Test( bool a, int b, string c )
    : this( a, b )
{
    this.m_C = c;
}
public Test( bool a, int b, float d )
    : this( a, b )
{
    this.m_D = d;
}
private Test( bool a, int b )
{
    this.m_A = a;
    this.m_B = b;
}

Source Courtesy of csharp411.com

Like this:

public Sample(string str) : this(int.Parse(str)) { }