# contentHash

> Provides the hash value for the property. (Read Only)

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public uint contentHash { get; }
```

### Remarks

You can use this to track if there has been any changes to the value at the property path (Additional Resources: [SerializedProperty.propertyPath](/engine/6000.7/script-reference/unityeditor/serializedproperty/propertypath.md)).

Please note that:

-If the size of the property's content is smaller than or equal to 32 bits, then the content will be returned instead of a hash.

-If the property path leads to an array or complex type, the hash will correspond to the entire content.

-If the property is a field with \[SerializeReference] attribute, or a compound type that contains such a field, then the content hashing doesn't include the content of the referenced object, instead it only hashes the reference id (Additional Resources: [SerializedProperty.managedReferenceId](/engine/6000.7/script-reference/unityeditor/serializedproperty/managedreferenceid.md)).

### Examples

```csharp
using UnityEngine;
using UnityEditor;

public class MyObject : ScriptableObject
{
    public string myString = "answer to life the universe and everything";
    public string[] myStringArray = { "answer", "to", "life", "the", "universe", "and", "everything" };
    public int[] myIntArray = { 42, 442, 422, 4242 };

    [MenuItem("Example/Output contentHash from SerializedProperty")]
    static void OutputContentHashFromSerializedProperty()
    {
        var scriptableObject = ScriptableObject.CreateInstance<MyObject>();

        using (var serializedObject = new SerializedObject(scriptableObject))
        {
            SerializedProperty serializedPropertyMyString = serializedObject.FindProperty("myString");
            SerializedProperty serializedPropertyMyStringArray = serializedObject.FindProperty("myStringArray");
            SerializedProperty serializedPropertyMyIntArray = serializedObject.FindProperty("myIntArray");

            uint myStringHash = serializedPropertyMyString.contentHash;
            uint myStringArrayHash = serializedPropertyMyStringArray.contentHash;
            uint MyIntArrayHash = serializedPropertyMyIntArray.contentHash;

            serializedPropertyMyString.stringValue = "new string";
            serializedPropertyMyIntArray.DeleteArrayElementAtIndex(1);

            serializedObject.ApplyModifiedPropertiesWithoutUndo();

            Debug.Log(string.Format("myString: before={0}, after={1}, changed={2}", myStringHash, serializedPropertyMyString.contentHash, myStringHash == serializedPropertyMyString.contentHash ? "no" : "yes"));
            Debug.Log(string.Format("myStringArrayHash: before={0}, after={1}, changed={2}", myStringArrayHash, serializedPropertyMyStringArray.contentHash, myStringArrayHash == serializedPropertyMyStringArray.contentHash ? "no" : "yes"));
            Debug.Log(string.Format("MyIntArrayHash: before={0}, after={1}, changed={2}", MyIntArrayHash, serializedPropertyMyIntArray.contentHash, MyIntArrayHash == serializedPropertyMyIntArray.contentHash ? "no" : "yes"));
        }
    }
}
```