Web Reference: Jan 30, 2019 · The Reason for this error is that the namespace System.Data.SqlClient will not be referenced by the .NET Core project by default as done by .NET Framework, So, in .NET Core, you have to manually add the package to the project. Jun 8, 2021 · Error CS1069 The type name ‘SqlConnection’ could not be found in the namespace ‘System.Data.SqlClient’. This type has been forwarded to assembly ‘System.Data.SqlClient, Version=4.6.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ Consider adding a reference to that assembly. Oct 10, 2022 · Make sure that the 'System.Data.SqlClient' assembly is present in your project's output directory or in a location where it can be discovered by the runtime. If the assembly is missing, you might need to add it as a reference to your project.
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