Call one constructor from the body of another in C#

Question

I need to call one constructor from the body of another one. How can I do that?

Basically

class foo {     public foo (int x, int y)     {     }      public foo (string s)     {         // ... do something          // Call another constructor         this (x, y); // Doesn't work         foo (x, y); // neither     } } 

Answer 1

You can't.

You'll have to find a way to chain the constructors, as in:

public foo (int x, int y) { } public foo (string s) : this(XFromString(s), YFromString(s)) { ... } 

or move your construction code into a common setup method, like this:

public foo (int x, int y) { Setup(x, y); } public foo (string s) {    // do stuff    int x = XFromString(s);    int y = YFromString(s);    Setup(x, y); }  public void Setup(int x, int y) { ... }