the 'this' object cannot be used before all of its fields are assigned to

                
                        struct MyStruct
{
  public int SomeProp { get; set; }

  public MyStruct(int someVal) : this()
  {
     this.SomeProp = someVal;
  }
}
 // By calling :this() from your constructor declaration you let the base ValueType class initialize all the backing fields for the automatic properties. We cannot do it manually on our constructor because we don't have access to the backing field of an automatic property. ValueType is the base class of all structs.