String - Extract

A string extension method that extracts this object.

Try it

public static void Main()
{	
    string input = "Mwasdf{123c[45z6]6c7v8}";

	//C# Extension Method: String - Extract
    var output = input.Extract(x => !char.IsLetter(x));

    Console.WriteLine(output);
}

View Source
using System;
using System.Linq;

public static partial class Extensions
{
    /// <summary>
    ///     A string extension method that extracts this object.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <param name="predicate">The predicate.</param>
    /// <returns>A string.</returns>
    public static string Extract(this string @this, Func<char, bool> predicate)
    {
        return new string(@this.ToCharArray().Where(predicate).ToArray());
    }
}