Use Standard Controllers

Use Standard Controllers from (module - Visualforce Basics)

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SOURCE CODE: ContactView (Visualforce page)

<apex:page standardController="Contact">
    <apex:pageBlock title="Contact Summary">
        <apex:pageBlockSection>
            First Name: {! Contact.FirstName } <br/>
            Last Name: {! Contact.LastName } <br/>
            Owner Email: {! Contact.Owner.Email } <br/>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:page>