The mars tds header contained errors asp net core ef core 2 1 4 azure sql


ASP.NET is a popular language used for building web applications. It provides a for developing dynamic websites, web services, and web applications. In this article, we will explore some common related to the ASP.NET programming language and provide solutions with examples.

Problem: The Mars TDS Header Contained Errors

One common that developers may encounter when working with ASP.NET is the error message “The Mars TDS Header Contained Errors.” This error occurs when multiple active result sets (MARS) are enabled in the connection , but the server does not support it.

To solve this issue, you can disable MARS in the connection string by setting the “MultipleActiveResultSets” to “false”. Here's an example of how to do it:

string connectionString = "Data Source=myServerAddress;Initial Catalog=myDataBase;User Id=myUsername;=myPassword;MultipleActiveResultSets=false;";

By setting the “MultipleActiveResultSets” property to “false”, you are disabling MARS and preventing the error from occurring.

Problem: ASP.NET Core EF Core 2.1.4 Azure SQL

common issue that developers may face is compatibility issues ASP.NET Core EF Core 2.1.4 and Azure SQL. This issue can cause errors when trying to connect to an Azure SQL database using EF Core 2.1.4.

To solve this issue, you can update the EF Core version to a compatible version with Azure SQL. For example, you can upgrade to EF Core 3.1. Here's an example of how to update the EF Core version:

dotnet add package Microsoft. --version 3.1.0

By updating the EF Core version to a compatible version with Azure SQL, you can resolve the compatibility issues and connect to the Azure SQL database successfully.


ASP.NET is a powerful programming language for building web applications. However, developers may encounter various issues while working with ASP.NET. In this article, we discussed two common issues and provided solutions with examples. By following these solutions, developers can overcome these issues and continue developing robust web applications using ASP.NET.

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