system.stackoverflowexception Cannot evaluate expression because the current thread is in a stack overflow state

Question

I am getting a System.StackOverFlowException when the code hits this function. Where stringtype is user defined tupe and equals int the function in the type library. ``` public static bool Equals(StringType leftHand, StringType rightHand) { if (leftHand == rightHand) { return true; } if ((leftHand == "0") || (rightHand == "0")) { return false; } return (leftHand.myValue.Equals(rightHand.myValue) && leftHand.myState.Equals(rightHand.myState)); } ```

Accepted Answer

This

```
if (leftHand == rightHand)
```

change to

```
if (object.ReferenceEquals(leftHand, rightHand))
```

You probably redefined the `==` operator to call `Equals`.

And I hope you don't have an implicit operator that from `string` creates `StringType`, because otherwise

```
if ((leftHand == "0") || (rightHand == "0"))
```

will probably call itself for the same reason.

Probably

```
if ((leftHand.myValue == "0") || (rightHand.myValue == "0"))
```

would be better.

system.stackoverflowexception Cannot evaluate expression because the current thread is in a stack overflow state

Solution

Problem