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c# - Best way to remove items from a collection

What is the best way to approach removing items from a collection in C#, once the item is known, but not it's index. This is one way to do it, but it seems inelegant at best.

//Remove the existing role assignment for the user.
int cnt = 0;
int assToDelete = 0;
foreach (SPRoleAssignment spAssignment in workspace.RoleAssignments)
{
    if (spAssignment.Member.Name == shortName)
    {
        assToDelete = cnt;
    }
    cnt++;
}
workspace.RoleAssignments.Remove(assToDelete);

What I would really like to do is find the item to remove by property (in this case, name) without looping through the entire collection and using 2 additional variables.

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If RoleAssignments is a List<T> you can use the following code.

workSpace.RoleAssignments.RemoveAll(x =>x.Member.Name == shortName);

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