C# API for speaker diarization (#1407)

scripts/dotnet/OfflineSpeakerSegmentationModelConfig.cs

@@ -0,0 +1,32 @@
+/// Copyright (c)  2024  Xiaomi Corporation
+
+using System.Runtime.InteropServices;
+
+namespace SherpaOnnx
+{
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct OfflineSpeakerSegmentationModelConfig
+    {
+        public OfflineSpeakerSegmentationModelConfig()
+        {
+            Pyannote = new OfflineSpeakerSegmentationPyannoteModelConfig();
+            NumThreads = 1;
+            Debug = 0;
+            Provider = "cpu";
+        }
+
+        public OfflineSpeakerSegmentationPyannoteModelConfig Pyannote;
+
+        /// Number of threads used to run the neural network model
+        public int NumThreads;
+
+        /// true to print debug information of the model
+        public int Debug;
+
+        [MarshalAs(UnmanagedType.LPStr)]
+        public string Provider;
+    }
+}
+
+