# .net Could not load type 'Sendbird.Chat.SbInitParams'

**URL:** <https://community.sendbird.com/t/net-could-not-load-type-sendbird-chat-sbinitparams/10570>\
**Category:** Miscellaneous\
**Created:** [January 27, 2025, 7:59pm UTC](https://community.sendbird.com/t/net-could-not-load-type-sendbird-chat-sbinitparams/10570 "2025-01-27T19:59:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sulamana](https://avatars.discourse-cdn.com/v4/letter/s/bc79bd/32.png) [@sulamana](https://community.sendbird.com/u/sulamana)\
**Post date:** [January 27, 2025, 7:59pm UTC](https://community.sendbird.com/t/net-could-not-load-type-sendbird-chat-sbinitparams/10570/1 "2025-01-27T19:59:42Z")

</div>

I’ve download and installed the Sendbird.Chat; package and on initialization I keep getting the following error

See the end of this message for details on invoking  
just-in-time (JIT) debugging instead of this dialog box.

\*\*\*\*\*\*\*\*\*\*\*\*\*\* Exception Text \*\*\*\*\*\*\*\*\*\*\*\*\*\*  
System.TypeLoadException: Could not load type ‘Sendbird.Chat.SbInitParams’ from assembly ‘SendBirdChat, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null’.  
at SendBirdChat.Form1.\<toolStripButtonConnect\_Click\>d\_\_4.MoveNext()  
at System.Runtime.CompilerServices.AsyncVoidMethodBuilder.Start[TStateMachine](TStateMachine& stateMachine)  
at SendBirdChat.Form1.toolStripButtonConnect\_Click(Object sender, EventArgs e)  
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)  
at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)  
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)  
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)  
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)  
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)  
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)  
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)  
at System.Windows.Forms.Control.WndProc(Message& m)  
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)  
at System.Windows.Forms.ToolStrip.WndProc(Message& m)  
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)  
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)  
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

not sure what I’m doing wrong but it’s the first line in the program which crashes

```
            SendbirdChat.Init(new SbInitParams("xxxxxx-BC11-4851-B53E-A22F2A4E9F01"));

```

Any help will be gratefully apprecaited