feat(csharp/Tensor.NET): add clone method implementation.

Author: SanftMonster

csharp/Tensor.NET/Tensor/Tensor.cs

@@ -64,6 +64,11 @@ public T this[params int[] indices]{
             }
         }
 
+        /// <summary>
+        /// Make the tensor contiguous. Note that if the tensor is already contiguous, the method will return itself.
+        /// If the tensor is not contiguous, a new contiguous tensor will be returned.
+        /// </summary>
+        /// <returns></returns>
         public Tensor<T> ToContiguousTensor(){
             Tensor<T> res = new Tensor<T>(new TensorLayout(TLayout as TensorShape, TLayout.DType));
             this.CopyTo(res);
@@ -105,9 +110,13 @@ IEnumerator<T> IEnumerable<T>.GetEnumerator()
         IEnumerator IEnumerable.GetEnumerator()
             => new TensorEnumerator<T>(this);
 
-        [Obsolete("This method need to be revised in the future because the tensor may not be contiguous", true)]
         public object Clone(){
-            return new Tensor<T>(new TensorMemory<T>(TMemory.AsSpan()), new TensorLayout(TLayout));
+            if(TLayout.IsContiguous()){
+                return new Tensor<T>(new TensorMemory<T>(TMemory.AsSpan()), new TensorLayout(TLayout));
+            }
+            else{
+                return ToContiguousTensor();
+            }
         }
 
         public override string ToString()

doc/TODO.md

@@ -54,7 +54,7 @@
 | Add arrange op |  | p0 | Complete ✅ |
 | Add zeros_like, ones_like, fill_like methods |  | p0 | Complete ✅ |
 | Add flatten method |  | p0 | Complete ✅ |
-| Add max, min, mean op |  | p0 | Waiting 🔵 |
+| Add max, min, mean op |  | p0 | Complete ✅ |
 
 
 ✅   ❌   🚀   🔵