C# Multi line text box error
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i have created an application, there i have try to save the data from multiline text box to data base. But it will shown a error like 
**"String or binary data would be truncated.The statement has been terminated."**
why it will come, what should i do for store data from multiline textbox.

this is the code i have given for store the data for multiline textbox.

     cmd.Parameters.AddWithValue("@spec", TextBox3.Text);