c# - Can not set cascading property while setting single property works fine -

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following code not set property. nothing , @ debugging jumps ahead, f11

job.tdatareference.checkedout = false;

job of type tjob class build myself property:

public tdatareference tdatareference {         {         return new tdatareference(this.datareference);     }     set { this.tdatareference = value; } }

tdatareference class build myself property:

public bool checkedout {     { return (datarow[checkedout].tostring() == "true"); }     set { datarow[checkedout] = value.tostring(); } }

and , private member datarow of type datarow

what funny following code works fine , sets property:

tdatareference dr = job.tdatareference; dr.checkedout = false;

who can explain me.

update

many answers! understand problem. :)

tdatareference depends on value in this.datareference earlyest time tdatareference can set when this.datareference known. how think changing this:

private tdatareference tdatareference;  public tdatareference tdatareference {         {     if(tdatareference == null | tdatareference.id != this.datareference)     {         this.tdatareference = new tdatareference(this.datareference);     }             return this.tdatareference      }     set { this.tdatareference = value; } }

and wil setting cascading property work then???

your property getter creates new instance every time call it. code:

job.tdatareference.checkedout = false; // here setting checkedout 1st instance of tdatareference job.tdatareference.checkedout = false; // here setting checkedout 2nd instance of tdatareference

is analogue of pseudocode:

var tdataref1 = new tdatareference(job.datareference); tdataref1.checkedout = false;  var tdataref2 = new tdatareference(job.datareference); tdataref2.checkedout = false;

you shouldn't write property way, violates design guidelines. consider result of condition:

job.tdatareference == job.tdatareference // false, ooops...

to avoid situation, fix property such way:

public tdatareference tdatareference {         {         return tdatareference;     }     set { this.tdatareference = value; } } // field initialization optional here, can omit  // or make lazy initialization in getter this:  // return tdatareference ?? (tdatareference = new tdatareference(this.datareference)); private tdatareference tdatareference = new tdatareference(this.datareference);

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