How to know what got modified in an Object?

[EDN Admin]

Hi Guys,
How to know that which variable/ property got modified (of policytransactionmodel instance ) to return true in the below snippet?
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
<span style="color:#2b91af; font-family:Consolas; font-size:13px; line-height:normal PolicyTransactionModel and PolicyUnderwriterModel are two diff. classes.<span style="color:#2b91af; font-family:Consolas; font-size:13px; line-height:normal <span style="font-size:9.5pt; font-family:Consolas; color:blue
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
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<span style="font-size:9.5pt; font-family:Consolas; color:blue private<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue bool<span style="font-size:9.5pt; font-family:Consolas HasChanges<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas {<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue get<span style="font-size:9.5pt; font-family:Consolas <span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas {<span style="font-family:Consolas; font-size:9.5pt
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<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue foreach<span style="font-size:9.5pt; font-family:Consolas (<span style="font-size:9.5pt; font-family:Consolas; color:blue var<span style="font-size:9.5pt; font-family:Consolas key <span style="font-size:9.5pt; font-family:Consolas; color:blue in<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue new<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:#2b91af List<span style="font-size:9.5pt; font-family:Consolas <<span style="font-size:9.5pt; font-family:Consolas; color:#2b91af Type<span style="font-size:9.5pt; font-family:Consolas >
{<span style="font-size:9.5pt; font-family:Consolas; color:blue typeof<span style="font-size:9.5pt; font-family:Consolas (<span style="font-size:9.5pt; font-family:Consolas; color:#2b91af PolicyUnderwriterModel<span style="font-size:9.5pt; font-family:Consolas ), <span style="font-size:9.5pt; font-family:Consolas; color:blue typeof<span style="font-size:9.5pt; font-family:Consolas (<span style="font-size:9.5pt; font-family:Consolas; color:#2b91af PolicyTransactionModel<span style="font-size:9.5pt; font-family:Consolas )})<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas {<span style="text-decoration:underline <span style="text-decoration:underline
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue if<span style="font-size:9.5pt; font-family:Consolas (!ModelDictionary.ContainsKey(<wbr>key))<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas {<span style="text-decoration:underline <span style="text-decoration:underline
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doesnt have <span style="font-size:9.5pt; font-family:Consolas; color:#3cb371 {0}<span style="font-size:9.5pt; font-family:Consolas; color:#a31515 "<span style="font-size:9.5pt; font-family:Consolas , key));<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas }<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas <span style="text-decoration:underline <span style="text-decoration:underline
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue if<span style="font-size:9.5pt; font-family:Consolas (ModelDictionary[key].<wbr>HasChanges)<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas {<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue return<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue true<span style="font-size:9.5pt; font-family:Consolas ;
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<span style="font-size:9.5pt; font-family:Consolas <span style="text-decoration:underline <span style="white-spacere // returns true when key=PolicyTransactionModel.
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<span style="font-size:9.5pt; font-family:Consolas }<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas }<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas <span style="text-decoration:underline <span style="text-decoration:underline
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue return<span style="font-size:9.5pt; font-family:Consolas <span style="font-size:9.5pt; font-family:Consolas; color:blue false<span style="font-size:9.5pt; font-family:Consolas ;<span style="text-decoration:underline <span style="text-decoration:underline
<p style="margin-bottom:0px; color:#222222; font-family:arial,sans-serif; font-size:13px; line-height:normal
<span style="font-size:9.5pt; font-family:Consolas }<span style="text-decoration:underline <span style="text-decoration:underline
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<span style="font-size:9.5pt; font-family:Consolas }
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<span style="font-size:9.5pt; font-family:Consolas
<br/>
PolicyTransactionModel has fields like<br/>
_policyTransactionModelid , _policyTransactionModelVersion etc.
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<span style="color:#2b91af; font-family:Consolas; font-size:13px; line-height:normal <span style="color:#2b91af; font-family:Consolas; font-size:13px; line-height:normal
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<span style="color:#2b91af; font-family:Consolas; font-size:13px; line-height:normal kindly Help.<span style="font-size:9.5pt; font-family:Consolas <hr class="sig Lalit

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