Extension method to get property name

I have an extension method to get property name as

public static string Name<T>(this Expression<Func<T>> expression)
{
    MemberExpression body = (MemberExpression)expression.Body;
    return body.Member.Name;
}

I am calling it as

string Name = ((Expression<Func<DateTime>>)(() => this.PublishDateTime)).Name();

This is working fine and returns me PublishDateTime as string.

However I have an issue with the calling statement, it is looking too complex and I want some thing like this.

this.PublishDateTime.Name()

Can some one modify my extension method?