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    <p>I think the issue that you're having is because you're trying to create a generic type, and then create a list of that generic type. You could accomplish what you're trying to do by contracting out the data types you're trying to support, say as an IData element, and then create your MyData generic with a constraint of IData. The downside to this would be that you would have to create your own data types to represent all the primitive data types you're using (string, int, float, long). It might look something like this:</p> <pre><code>public class MyData&lt;T, C&gt; where T : IData&lt;C&gt; { public T Data { get; private set; } public MyData (T value) { Data = value; } } public interface IData&lt;T&gt; { T Data { get; set; } void SomeMethod(); } //you'll need one of these for each data type you wish to support public class MyString: IData&lt;string&gt; { public MyString(String value) { Data = value; } public void SomeMethod() { //code here that uses _data... Console.WriteLine(Data); } public string Data { get; set; } } </code></pre> <p>and then you're implementation would be something like:</p> <pre><code>var myData = new MyData&lt;MyString, string&gt;(new MyString("new string")); // Could be MyString, MyInt, ... myData.Data.SomeMethod(); </code></pre> <p>it's a little more work but you get the functionality you were going for.</p> <p><strong>UPDATE:</strong> remove SomeMethod from your interface and just do this</p> <pre><code>SomeMethod(myData.Data.Data); </code></pre>
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    1. POC#: Declaring and using a list of generic classes with different types, how?
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    1. COToo bad I need to wrap the primitive types but that is something I am willing to accept as there is no other way it would seem. However, in your example, you assumed that SomeMethod() was part of MyData which is not the case (I've updated the question).
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    2. COactually you can accomplish the same thing, i just wrapped it so it would be more encapsulated, see my update
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    3. COSo... how does one place MyData<MyString, string> and MyData<MyFloat, float> into the same collection?
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