C# Example of Using LINQ – 1

ACMer

10 years ago

LINQ stands for Language-Integrated Query, which is made available to .NET programming languages from .NET 2.0. Coding using LINQ gives concise code and essentially it is a query where it does not get executed immediately until whenever needed.

The following code:

public class FileCollection : CollectionBase<string>
{
        public override bool Contains(string item)
        {
            foreach (string str in this)
            {
                if (string.Compare(str, item, true) == 0)
                    return true;
            }
            return false;
        }
}

public class FileCollection : CollectionBase<string>
{
        public override bool Contains(string item)
        {
            foreach (string str in this)
            {
                if (string.Compare(str, item, true) == 0)
                    return true;
            }
            return false;
        }
}

can thus be converted nicely to LINQ:

public class FileCollection : CollectionBase<string>
{
        public override bool Contains(string item)
        {
            return this.Any(str => string.Compare(str, item, true) == 0);
        }
}

public class FileCollection : CollectionBase<string>
{
        public override bool Contains(string item)
        {
            return this.Any(str => string.Compare(str, item, true) == 0);
        }
}

There is no performance difference so clearly the LINQ version is the winner!

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