IfNotNull<T, TResult>

        /// <summary>
        /// if the object this method is called on is not null, runs the given function and returns the value.
        /// if the object is null, returns default(TResult)
        /// </summary>
        public static TResult IfNotNull<T, TResult>( this T target, Func<T, TResult> getValue )
        {
            if ( target != null )
                return getValue( target );
            else
                return default( TResult );
        }
Example:
var username = HttpContext.Current.IfNotNull( ctx => ctx.User.IfNotNull( user => user.Identity.IfNotNull( iden => iden.Name ) ) );

Description

if the object this method is called on is not null, runs the given function and returns the value. if the object is null, returns default(TResult).

Details

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