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using System;
using System.Collections.Generic;
using System.Linq;
 
public class Test
{
	public static void Main()
	{
        var operators = new Dictionary<string, string>();
        operators.Add("plus", "x");
var s = "5 somerandom text that needs to be removed * 3".Where(c => operators.ContainsValue(c.ToString()) || double.TryParse(c.ToString(), out new double())).ToArray();
string NotInDictionary = new string(s); 
	Console.WriteLine(NotInDictionary);
	}
}

prog.cs(11,144): error CS1510: A ref or out argument must be an assignable variable
prog.cs(11,117): error CS1502: The best overloaded method match for `double.TryParse(string, out double)' has some invalid arguments
/usr/lib/mono/2.0/mscorlib.dll (Location of the symbol related to previous error)
prog.cs(11,117): error CS1503: Argument `#2' cannot convert `object' expression to type `double'
prog.cs(11,1): error CS0825: The contextual keyword `var' may only appear within a local variable declaration
prog.cs(12,37): error CS0841: A local variable `s' cannot be used before it is declared
prog.cs(12,26): error CS1502: The best overloaded method match for `string.String(char*)' has some invalid arguments
/usr/lib/mono/2.0/mscorlib.dll (Location of the symbol related to previous error)
prog.cs(12,26): error CS1503: Argument `#1' cannot convert `object' expression to type `char*'
Compilation failed: 7 error(s), 0 warnings

Standard output is empty