[Feature] Sync csharp apis with newly added c apis && demo

.gitignore

@@ -164,3 +164,6 @@ service/snpe/grpc_cpp_plugin
 csrc/mmdeploy/preprocess/elena/json
 csrc/mmdeploy/preprocess/elena/cpu_kernel/*
 csrc/mmdeploy/preprocess/elena/cuda_kernel/*
+
+# c#
+demo/csharp/*/Properties

csrc/mmdeploy/apis/csharp/MMDeploy/APIs/Context.cs

@@ -0,0 +1,69 @@
+namespace MMDeploy
+{
+    /// <summary>
+    /// Context.
+    /// </summary>
+    public class Context : DisposableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Context"/> class.
+        /// </summary>
+        public Context()
+        {
+            ThrowException(NativeMethods.mmdeploy_context_create(out _handle));
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Context"/> class with device.
+        /// </summary>
+        /// <param name="device">device.</param>
+        public Context(Device device) : this()
+        {
+            Add(device);
+        }
+
+        /// <summary>
+        /// Add model to the context.
+        /// </summary>
+        /// <param name="name">name.</param>
+        /// <param name="model">model.</param>
+        public void Add(string name, Model model)
+        {
+            ThrowException(NativeMethods.mmdeploy_context_add(this, (int)ContextType.MODEL, name, model));
+        }
+
+        /// <summary>
+        /// Add scheduler to the context.
+        /// </summary>
+        /// <param name="name">name.</param>
+        /// <param name="scheduler">scheduler.</param>
+        public void Add(string name, Scheduler scheduler)
+        {
+            ThrowException(NativeMethods.mmdeploy_context_add(this, (int)ContextType.SCHEDULER, name, scheduler));
+        }
+
+        /// <summary>
+        /// Add device to the context.
+        /// </summary>
+        /// <param name="device">device.</param>
+        public void Add(Device device)
+        {
+            ThrowException(NativeMethods.mmdeploy_context_add(this, (int)ContextType.DEVICE, "", device));
+        }
+
+        /// <summary>
+        /// Add profiler to the context.
+        /// </summary>
+        /// <param name="profiler">profiler.</param>
+        public void Add(Profiler profiler)
+        {
+            ThrowException(NativeMethods.mmdeploy_context_add(this, (int)ContextType.PROFILER, "", profiler));
+        }
+
+        /// <inheritdoc/>
+        protected override void ReleaseHandle()
+        {
+            NativeMethods.mmdeploy_model_destroy(_handle);
+        }
+    }
+}

csrc/mmdeploy/apis/csharp/MMDeploy/APIs/Device.cs

@@ -0,0 +1,39 @@
+namespace MMDeploy
+{
+    /// <summary>
+    /// Device.
+    /// </summary>
+    public class Device : DisposableObject
+    {
+        private readonly string _name;
+        private readonly int _index;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Device"/> class.
+        /// </summary>
+        /// <param name="name">device name.</param>
+        /// <param name="index">device index.</param>
+        public Device(string name, int index = 0)
+        {
+            this._name = name;
+            this._index = index;
+            ThrowException(NativeMethods.mmdeploy_device_create(name, index, out _handle));
+        }
+
+        /// <summary>
+        /// Gets device name.
+        /// </summary>
+        public string Name { get => _name; }
+
+        /// <summary>
+        /// Gets device index.
+        /// </summary>
+        public int Index { get => _index; }
+
+        /// <inheritdoc/>
+        protected override void ReleaseHandle()
+        {
+            NativeMethods.mmdeploy_device_destroy(_handle);
+        }
+    }
+}

csrc/mmdeploy/apis/csharp/MMDeploy/APIs/DisposableObject.cs

@@ -92,5 +92,11 @@ protected static void ThrowException(int result)
                 throw new Exception(result.ToString());
             }
         }
+
+        /// <summary>
+        /// Gets internal handle.
+        /// </summary>
+        /// <param name="obj">instance.</param>
+        public static implicit operator IntPtr(DisposableObject obj) => obj._handle;
     }
 }

csrc/mmdeploy/apis/csharp/MMDeploy/APIs/Model.cs

@@ -0,0 +1,23 @@
+namespace MMDeploy
+{
+    /// <summary>
+    /// model.
+    /// </summary>
+    public class Model : DisposableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Model"/> class.
+        /// </summary>
+        /// <param name="modelPath">model path.</param>
+        public Model(string modelPath)
+        {
+            ThrowException(NativeMethods.mmdeploy_model_create_by_path(modelPath, out _handle));
+        }
+
+        /// <inheritdoc/>
+        protected override void ReleaseHandle()
+        {
+            NativeMethods.mmdeploy_model_destroy(_handle);
+        }
+    }
+}