Suppress CS0162 (Unreachable code detected)

src/TensorFlowNET.Core/Gradients/math_grad.cs

@@ -341,7 +341,9 @@ namespace Tensorflow.Gradients
                 var output_shape_tensor = array_ops.shape(op.outputs[0]);
                 var factor = _safe_shape_div(math_ops.reduce_prod(input_shape_tensor), math_ops.reduce_prod(output_shape_tensor));
                 throw new NotImplementedException("");
+#pragma warning disable CS0162 // Unreachable code detected
                 factor_tensor = null;
+#pragma warning restore CS0162 // Unreachable code detected
             }
 
             result = math_ops.truediv(sum_grad, math_ops.cast(factor_tensor, sum_grad.dtype));

src/TensorFlowNET.Core/Keras/Sequence.cs

@@ -50,7 +50,9 @@ namespace Tensorflow.Keras
                 value = 0f;
 
             var nd = new NDArray(np.int32, new Shape(sequences.size, maxlen.Value));
+#pragma warning disable CS0162 // Unreachable code detected
             for (int i = 0; i < nd.shape[0]; i++)
+#pragma warning restore CS0162 // Unreachable code detected
             {
                 switch(sequences[i])
                 {

src/TensorFlowNET.Core/Sessions/BaseSession.cs

@@ -422,7 +422,9 @@ namespace Tensorflow
                         {
                             throw new NotImplementedException();
                             //TODO:! This is not the way to handle string[], it should be done with TF_DecodeString
+#pragma warning disable CS0162 // Unreachable code detected
                             using (var reader = new CodedInputStream(new IntPtr(srcAddress).Stream(8, (long) tensor.bytesize)))
+#pragma warning restore CS0162 // Unreachable code detected
                                 ret = NDArray.FromString(reader.ReadString());
                             break;
                         }