Highlight Changes between two string in VB.Net

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VB

ASP.NET

Javascript

Hello All,

I have Two string

dim str1 as string = "Prashant Want To Change String 1."
dim str2 as string = "Prashant Patil wanted to show String 2."

Above string has some changes..

I want to Highlight that changes in aspx.page using vb.net
Like Below Output....

" Prashant Patil wanted to show Changes String 2."

please help me.

if possible provide me links for reference.

Thanks and Regards,
Prashant Patil
India.