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Objects in C# are passed around by reference and not by value. What this means is that when you do this: 
 
productbzCore = productbzAux; 
 
productbzCore is just a reference to productbzAux (it's exactly the same object in memory) so when you update a property on one, you update the property on both. You would need to clone the object before assigning new values. 
 
Depending on your needs there are various ways to do this (IClonable / extension methods / manually). Have a Google around to find the method that best suits your app. Then you would clone the old object into the new one: 
 
productbzCore = productbzAux.YourCloneMethod(); 
productbzCore.ProductType = &quot;C&quot;;
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Dinesh Bali

Chief Technology Ninja

Chinmay Patel

<div>
Many thanks for the details, 
I tried cloning the object from google. 
 
I implemented : ICloneable to the object. See below. 
 
And wrote clone method. But it gives me error below: 
 

<pre><code class="code-1 nolinks" id="code-20-42732526-1">Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0738	'ProductItem' does not implement interface member 'ICloneable.Clone()'. 'ProductItem.Clone()' cannot implement 'ICloneable.Clone()' because it does not have the matching return type of 'object'.	BusinessEntities	C:\git-workspace\Entities\ShoppingCartBE.cs	595	Active
</code></pre>
 

<pre><code class="code-10 nolinks" id="code-20-42732526-2">public class ProductItem : ICloneable
 {
 public string ProductCode { get; set; }
 public string ProductName { get; set; }
 public double Rate { get; set; }
 public string SubCategoryCode { get; set; }
 public string SubCategoryName { get; set; }
 public string ProductType { get; set; } /*C=Core; A=Auxilary*/
 public string ProductGroup { get; set; }
 public bool QtyBasedOnPaxCount { get; set; }
 
 public double AEDRate { get; set; }

 public ProductItem Clone()
 {
 ProductItem productItem = new ProductItem();
 productItem.AEDRate = this.AEDRate;
 productItem.ProductType = this.ProductType;

 return productItem;
 }
 }
</code></pre>
 
Below is the cloned code. Please advise 

<pre><code class="code-1 nolinks" id="code-20-42732526-3"> productCategoryBEList.Remove(productCategoryAUXBE);
 List&lt;ProductItem&gt; products = productCategoryAUXBE.Products;
 ProductItem productbzCore = new ProductItem();
 productbzCore = productbzAux.Clone() // CLoned Here
 productbzCore.ProductType = &quot;C&quot;;
 products.Add(productDubzCore);
</code></pre>
 
Regards
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You said, you want to clone the Product. Why do you then create a new ProductItem? Inconsistent semantics? 
 
E.g. 
 

<pre><code class="code-1 nolinks" id="code-20-42732769-1">var clonedProduct = productbzAux.Clone() 
clonedProduct.ProductType = &quot;C&quot;;
products.Add(clonedProduct);
</code></pre>
p.s. use better names. This reduces the need for comments and makes code better readable. 
 
p.p.s. a type should normally be a enum instead of a simple value, But in this case it maybe even be its own sub-classes. 
 
p.p.p.s. format your code..
</div>

<div>
Many Thanks. 
 
This is already running project. 
For some new requirement I need the clone of the object and modify the productType. 
I don't wanted to touch the existing object as this is heavily used in the project and is live. 
 
Yes, I agree we need to create enum's that I will do it. 
 
For now I just wanted to duplicate my object and where I just wanted to change the producttype of the cloned objected. 
Rest of the properties is required as is. 
 
Regards,
</div>

<div>
<div class="content wysiwyg-content">
Hi, 
 
I have object called productbzAux &nbsp;and it product type has value &quot;A&quot;. I wanted to duplicate the same product with productType as &quot;C&quot; and add it to the same List object productCategoryBEList 
 
My below code is updating the productType for parent and child object i.e., productbzAux &nbsp;and productbzCore 
 
Also, please advise the best way to write the below code. 
 
The below code is in C# 
 
Thanks 
 

<pre><code class="code-10 nolinks" id="code-10-29125850-1">List&lt;ProductCategoryBE&gt; productCategoryBEList = shoppingCartBE.ArrivalBooking.AvailableProducts;

 if (productCategoryBEList != null)
 {
 ProductCategoryBE productCategoryAUXBE = productCategoryBEList.FirstOrDefault(p =&gt; p.CategoryCode.ToUpper().Contains(&quot;AUX&quot;));
 ProductItem productbzAux = productCategoryAUXBE.Products.FirstOrDefault(t =&gt; t.SubCategoryCode.ToUpper().Contains(&quot;bz&quot;));

 if (productbzAux != null)
 {
 productCategoryBEList.Remove(productCategoryAUXBE);
 List&lt;ProductItem&gt; products = productCategoryAUXBE.Products;
 ProductItem productbzCore = new ProductItem();
 productbzCore = productbzAux;
 productbzCore.ProductType = &quot;C&quot;; // This is updating the ProductType of parent object i.e., productbzAux.ProductType where as it should be A for parent and C for child.
 products.Add(productbzCore);

 productCategoryAUXBE.Products = products;

 productCategoryBEList.Add(productCategoryAUXBE);
 }
 }
</code></pre>
 
Regards,
</div>
</div>

Hi,

I have object called productbzAux  and it product type has value "A". I wanted to duplicate the same product with productType as "C" and add it to the same List object productCategoryBEList 

My below code is updating the productType for parent and child object i.e., productbzAux  and productbzCore 

Also, please advise the best way to write the below code.

The below code is in C#

Thanks

(CODE)

Regards,

Update child object reference

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).