Snippet

Concatenation with StringBuilder

StringBuilder is significantly more efficient than using '+' for strings in loops because it doesn't create new objects in memory for every change.

snippet.cs

csharp

using System.Text;
 
public class DataFormatter {
    public string FormatList(string[] items) {
        var sb = new StringBuilder();
        foreach (var item in items) {
            sb.Append("Item: ").Append(item).AppendLine();
        }
        return sb.ToString();
    }
}

Breakdown

var sb = new StringBuilder();

Creates a mutable buffer for building strings efficiently.

sb.Append("Item: ")

Adds text to the existing buffer without creating a new string instance.

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Concatenation with StringBuilder

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