API design thoughts for libgit2sharp

libgit2sharp.cs

using (var repo = new Repository("path\to\repo.git"))
{
    // Object lookup
    var obj = repo.Lookup("sha");
    var commit = repo.Lookup<Commit>("sha");
    var tree = repo.Lookup<Tree>("sha");
    var tag = repo.Lookup<Tag>("sha");

    // Rev walking
    foreach (var c in repo.Commits.Walk("sha")) { }
    var commits = repo.Commits.StartingAt("sha").Where(c => c).ToList();
    var sortedCommits = repo.Commits.StartingAt("sha").SortBy(SortMode.Topo).ToList();

    // Refs
    var reference = repo.Refs["refs/heads/master"];
    var allRefs = repo.Refs.ToList();
    foreach (var c in repo.Refs["HEAD"].Commits) { }
    foreach (var c in repo.Head.Commits) { }
    var headCommit = repo.Head.Commits.First();
    var allCommits = repo.Refs["HEAD"].Commits.ToList();
    var newRef = repo.Refs.CreateFrom(reference);
    var anotherNewRef = repo.Refs.CreateFrom("sha");

    // Branches
    // special kind of reference
    var allBranches = repo.Branches.ToList();
    var branch = repo.Branches["master"];
    var remoteBranch = repo.Branches["origin/master"];
    var localBranches = repo.Branches.Where(p => p.Type == BranchType.Local).ToList();
    var remoteBranches = repo.Branches.Where(p => p.Type == BranchType.Remote).ToList();
    var newBranch = repo.Branches.CreateFrom("sha");
    var anotherNewBranch = repo.Branches.CreateFrom(newBranch);
    repo.Branches.Delete(anotherNewBranch);

    // Tags
    // really another special kind of reference
    var aTag = repo.Tags["refs/tags/v1.0"];
    var allTags = repo.Tags.ToList();
    var newTag = repo.Tags.CreateFrom("sha");
    var newTag2 = repo.Tags.CreateFrom(commit);
    var newTag3 = repo.Tags.CreateFrom(reference);
}