Howto override List<T> Contains
c#, contains, generics, iequatable
Solution
You might want to try using this :
myList.Any(x => x.someProperty == someValue);
from MSDN : http://msdn.microsoft.com/en-us/library/bb534972.aspx
Determines whether any element of a sequence satisfies a condition.
The `x => x.someProperty == someValue` is called a `lambda expression` in case you didn't know.
And note that you can use this on anything implementing `IEnumerable`, so that doesn't restrict you to `List<T>`.
Problem
I want to compare a property instead of the entire object using a List[MyObject]. I therefore use IEquatable[MyObject] but the compiler still wants MyObject instead of the string property. Why? Here is what I got: ``` public class AnyClass { public List<AnyOtherClass> MyProperty { get; set; } public string AnyProperty { get; set; } public AnyClass(string[] Names, string[] Values, string AnyProperty) { this.AnyProperty = AnyProperty; this.MyProperty = new List<AnyOtherClass>(); for (int i = 0; i < Names.Length; i++) MyProperty.Add(new AnyOtherClass(Names[i], Values[i])); } } public class AnyOtherClass : IEquatable<string> { public AnyOtherClass(string Name, string Values) { this.Name = Name; this.Values = Values.Split(';').ToList(); } public string Name { get; set; } public List<string> Values { get; set; } public bool Equals(string other) { return this.Name.Equals(other); } } private void DoSomething() { string[] Names = new string[] { "Name1", "Name2" }; string[] Values = new string[] { "Value1_1;Value1_2", "Value2" }; AnyClass ac = new AnyClass(Names, Values, "any Property"); if (ac.MyProperty.Contains("Name1")) //Problem is here... //do something } ```